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+% ---------------------------------------------------------
+% LaTeX-Source for printing GFDL v1.3
+% Copyright © 2022, 2023 निरंजन
+%
+% This program is free software: you can redistribute it
+% and/or modify it under the terms of the GNU General Public
+% License as published by the Free Software Foundation,
+% either version 3 of the License, or (at your option) any
+% later version.
+%
+% This program is distributed in the hope that it will be
+% useful, but WITHOUT ANY WARRANTY; without even the implied
+% warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+% PURPOSE. See the GNU General Public License for more
+% details.
+%
+% You should have received a copy of the GNU General Public
+% License along with this program. If not, see
+% <https://www.gnu.org/licenses/>.
+% ---------------------------------------------------------
+\begin{center}
+  \textbf{\LARGE GNU Free Documentation License}
+
+  \bigskip
+  
+  Version 1.3, 3 November 2008
+  
+  Copyright \copyright{} 2000, 2001, 2002, 2007, 2008 Free
+  Software Foundation, Inc.
+  
+  \bigskip
+  
+  \url{https://fsf.org/}
+  
+  \bigskip
+  
+  Everyone is permitted to copy and distribute verbatim
+  copies of this license document, but changing it is not
+  allowed.
+
+  \bigskip
+  
+  \textbf{\Large Preamble}
+\end{center}
+
+\noindent
+The purpose of this License is to make a manual, textbook,
+or other functional and useful document \enquote{free} in
+the sense of freedom: to assure everyone the effective
+freedom to copy and redistribute it, with or without
+modifying it, either commercially or noncommercially.
+Secondarily, this License preserves for the author and
+publisher a way to get credit for their work, while not
+being considered responsible for modifications made by
+others.
+
+This License is a kind of \enquote{copyleft}, which means
+that derivative works of the document must themselves be
+free in the same sense. It complements the GNU General
+Public License, which is a copyleft license designed for
+free software.
+
+We have designed this License in order to use it for manuals
+for free software, because free software needs free
+documentation: a free program should come with manuals
+providing the same freedoms that the software does. But
+this License is not limited to software manuals; it can be
+used for any textual work, regardless of subject matter or
+whether it is published as a printed book. We recommend this
+License principally for works whose purpose is instruction
+or reference.
+
+\medskip
+\begin{center}
+  \textbf{\Large 1.\ APPLICABILITY AND DEFINITIONS}
+\end{center}
+
+\noindent
+This License applies to any manual or other work, in any
+medium, that contains a notice placed by the copyright
+holder saying it can be distributed under the terms of this
+License. Such a notice grants a world-wide, royalty-free
+license, unlimited in duration, to use that work under the
+conditions stated herein. The \enquote{\textbf{Document}},
+below, refers to any such manual or work. Any member of the
+public is a licensee, and is addressed as \enquote{%
+  \textbf{you}}. You accept the license if you copy, modify
+or distribute the work in a way requiring permission under
+copyright law.
+
+A \enquote{\textbf{Modified Version}} of the Document means
+any work containing the Document or a portion of it, either
+copied verbatim, or with modifications and/or translated
+into another language.
+
+A \enquote{\textbf{Secondary Section}} is a named appendix
+or a front-matter section of the Document that deals
+exclusively with the relationship of the publishers or
+authors of the Document to the Document's overall subject
+(or to related matters) and contains nothing that could fall
+directly within that overall subject. (Thus, if the Document
+is in part a textbook of mathematics, a Secondary Section
+may not explain any mathematics.) The relationship could be
+a matter of historical connection with the subject or with
+related matters, or of legal, commercial, philosophical,
+ethical or political position regarding them.
+
+The \enquote{\textbf{Invariant Sections}} are certain
+Secondary Sections whose titles are designated, as being
+those of Invariant Sections, in the notice that says that
+the Document is released under this License. If a section
+does not fit the above definition of Secondary then it is
+not allowed to be designated as Invariant. The Document may
+contain zero Invariant Sections. If the Document does not
+identify any Invariant Sections then there are none.
+
+The \enquote{\textbf{Cover Texts}} are certain short
+passages of text that are listed, as Front-Cover Texts or
+Back-Cover Texts, in the notice that says that the Document
+is released under this License. A Front-Cover Text may be at
+most 5 words, and a Back-Cover Text may be at most 25
+words.
+
+A \enquote{\textbf{Transparent}} copy of the Document means
+a machine-readable copy, represented in a format whose
+specification is available to the general public, that is
+suitable for revising the document straightforwardly with
+generic text editors or (for images composed of pixels)
+generic paint programs or (for drawings) some widely
+available drawing editor, and that is suitable for input to
+text formatters or for automatic translation to a variety of
+formats suitable for input to text formatters. A copy made
+in an otherwise Transparent file format whose markup, or
+absence of markup, has been arranged to thwart or discourage
+subsequent modification by readers is not Transparent. An
+image format is not Transparent if used for any substantial
+amount of text. A copy that is not \enquote{Transparent} is
+called \enquote{\textbf{Opaque}}.
+
+Examples of suitable formats for Transparent copies include
+plain ASCII without markup, Texinfo input format, \LaTeX\
+input format, SGML or XML using a publicly available DTD,
+and standard-conforming simple HTML, Post\-Script or PDF
+designed for human modification. Examples of transparent
+image formats include PNG, XCF and JPG. Opaque formats
+include proprietary formats that can be read and edited only
+by proprietary word processors, SGML or XML for which the
+DTD and/or processing tools are not generally available, and
+the machine-generated HTML, PostScript or PDF produced by
+some word processors for output purposes only.
+
+The \enquote{\textbf{Title Page}} means, for a printed book,
+the title page itself, plus such following pages as are
+needed to hold, legibly, the material this License requires
+to appear in the title page. For works in formats which do
+not have any title page as such, \enquote{Title Page} means
+the text near the most prominent appearance of the work's
+title, preceding the beginning of the body of the text.
+
+The \enquote{\textbf{publisher}} means any person or entity
+that distributes copies of the Document to the public.
+
+A section \enquote{\textbf{Entitled XYZ}} means a named
+subunit of the Document whose title either is precisely XYZ
+or contains XYZ in parentheses following text that
+translates XYZ in another language. (Here XYZ stands for a
+specific section name mentioned below, such as \enquote{%
+  \textbf{Acknowledgements}}, \enquote{\textbf{%
+    Dedications}}, \enquote{\textbf{Endorsements}}, or
+\enquote{\textbf{History}}.) To \enquote{\textbf{%
+    Preserve the Title}} of such a section when you modify
+the Document means that it remains a section \enquote{%
+  \textbf{Entitled XYZ}} according to this definition.
+
+The Document may include Warranty Disclaimers next to the
+notice which states that this License applies to the
+Document. These Warranty Disclaimers are considered to be
+included by reference in this License, but only as regards
+disclaiming warranties: any other implication that these
+Warranty Disclaimers may have is void and has no effect on
+the meaning of this License.
+
+\medskip
+\begin{center}
+  \textbf{\Large 2. VERBATIM COPYING}
+\end{center}
+
+\noindent
+You may copy and distribute the Document in any medium,
+either commercially or noncommercially, provided that this
+License, the copyright notices, and the license notice
+saying this License applies to the Document are reproduced
+in all copies, and that you add no other conditions
+whatsoever to those of this License. You may not use
+technical measures to obstruct or control the reading or
+further copying of the copies you make or distribute.
+However, you may accept compensation in exchange for copies.
+If you distribute a large enough number of copies you must
+also follow the conditions in section~3.
+
+You may also lend copies, under the same conditions stated
+above, and you may publicly display copies.
+
+\medskip
+\begin{center}
+  \textbf{\Large 3. COPYING IN QUANTITY}
+\end{center}
+
+\noindent
+If you publish printed copies (or copies in media that
+commonly have printed covers) of the Document, numbering
+more than 100, and the Document's license notice requires
+Cover Texts, you must enclose the copies in covers that
+carry, clearly and legibly, all these Cover Texts:
+Front-Cover Texts on the front cover, and Back-Cover Texts
+on the back cover. Both covers must also clearly and legibly
+identify you as the publisher of these copies. The front
+cover must present the full title with all words of the
+title equally prominent and visible. You may add other
+material on the covers in addition. Copying with changes
+limited to the covers, as long as they preserve the title of
+the Document and satisfy these conditions, can be treated as
+verbatim copying in other respects.
+
+If the required texts for either cover are too voluminous
+to fit legibly, you should put the first ones listed (as
+many as fit reasonably) on the actual cover, and continue
+the rest onto adjacent pages.
+
+If you publish or distribute Opaque copies of the Document
+numbering more than 100, you must either include a
+machine-readable Transparent copy along with each Opaque
+copy, or state in or with each Opaque copy a
+computer-network location from which the general
+network-using public has access to download using
+public-standard network protocols a complete Transparent
+copy of the Document, free of added material. If you use
+the latter option, you must take reasonably prudent steps,
+when you begin distribution of Opaque copies in quantity,
+to ensure that this Transparent copy will remain thus
+accessible at the stated location until at least one year
+after the last time you distribute an Opaque copy
+(directly or through your agents or retailers) of that
+edition to the public.
+
+It is requested, but not required, that you contact the
+authors of the Document well before redistributing any
+large number of copies, to give them a chance to provide
+you with an updated version of the Document.
+
+\medskip
+\begin{center}
+  \textbf{\Large 4. MODIFICATIONS}
+\end{center}
+
+\noindent
+You may copy and distribute a Modified Version of the
+Document under the conditions of sections 2 and 3 above,
+provided that you release the Modified Version under
+precisely this License, with the Modified Version filling
+the role of the Document, thus licensing distribution and
+modification of the Modified Version to whoever possesses
+a copy of it. In addition, you must do these things in
+the Modified Version:
+
+\begin{itemize}
+\item[A.] 
+  Use in the Title Page (and on the covers, if any) a
+  title distinct from that of the Document, and from those
+  of previous versions (which should, if there were any,
+  be listed in the History section of the Document). You
+  may use the same title as a previous version if the
+  original publisher of that version gives permission.
+  
+\item[B.]
+  List on the Title Page, as authors, one or more persons
+  or entities responsible for authorship of the
+  modifications in the Modified Version, together with at
+  least five of the principal authors of the Document (all
+  of its principal authors, if it has fewer than five),
+  unless they release you from this requirement.
+  
+\item[C.]
+  State on the Title page the name of the publisher of the
+  Modified Version, as the publisher.
+
+\item[D.]
+  Preserve all the copyright notices of the Document.
+  
+\item[E.]
+  Add an appropriate copyright notice for your
+  modifications adjacent to the other copyright notices.
+  
+\item[F.]
+  Include, immediately after the copyright notices, a
+  license notice giving the public permission to use the
+  Modified Version under the terms of this License, in the
+  form shown in the Addendum below.
+  
+\item[G.]
+  Preserve in that license notice the full lists of
+  Invariant Sections and required Cover Texts given in the
+  Document's license notice.
+
+\item[H.]
+  Include an unaltered copy of this License.
+
+\item[I.]
+  Preserve the section Entitled \enquote{History}, Preserve
+  its Title, and add to it an item stating at least the
+  title, year, new authors, and publisher of the Modified
+  Version as given on the Title Page. If there is no section
+  Entitled \enquote{History} in the Document, create one
+  stating the title, year, authors, and publisher of the
+  Document as given on its Title Page, then add an item
+  describing the Modified Version as stated in the previous
+  sentence.
+  
+\item[J.]
+  Preserve the network location, if any, given in the
+  Document for public access to a Transparent copy of the
+  Document, and likewise the network locations given in
+  the Document for previous versions it was based on.
+  These may be placed in the \enquote{History} section. You
+  may omit a network location for a work that was published
+  at least four years before the Document itself, or if the
+  original publisher of the version it refers to gives
+  permission.
+  
+\item[K.]
+  For any section Entitled \enquote{Acknowledgements} or
+  \enquote{Dedications}, Preserve the Title of the section,
+  and preserve in the section all the substance and tone of
+  each of the contributor acknowledgements and/or
+  dedications given therein.
+  
+\item[L.]
+  Preserve all the Invariant Sections of the Document,
+  unaltered in their text and in their titles. Section
+  numbers or the equivalent are not considered part of the
+  section titles.
+  
+\item[M.]
+  Delete any section Entitled \enquote{Endorsements}. Such a
+  section may not be included in the Modified Version.
+  
+\item[N.]
+  Do not retitle any existing section to be Entitled
+  \enquote{Endorsements} or to conflict in title with any
+  Invariant Section.
+  
+\item[O.]
+  Preserve any Warranty Disclaimers.
+\end{itemize}
+
+If the Modified Version includes new front-matter sections
+or appendices that qualify as Secondary Sections and
+contain no material copied from the Document, you may at
+your option designate some or all of these sections as
+invariant. To do this, add their titles to the list of
+Invariant Sections in the Modified Version's license
+notice. These titles must be distinct from any other
+section titles.
+
+You may add a section Entitled \enquote{Endorsements},
+provided it contains nothing but endorsements of your
+Modified Version by various parties---for example,
+statements of peer review or that the text has been approved
+by an organization as the authoritative definition of a
+standard.
+
+You may add a passage of up to five words as a Front-Cover
+Text, and a passage of up to 25 words as a Back-Cover Text,
+to the end of the list of Cover Texts in the Modified
+Version. Only one passage of Front-Cover Text and one of
+Back-Cover Text may be added by (or through arrangements
+made by) any one entity. If the Document already includes a
+cover text for the same cover, previously added by you or by
+arrangement made by the same entity you are acting on behalf
+of, you may not add another; but you may replace the old
+one, on explicit permission from the previous publisher that
+added the old one.
+
+The author(s) and publisher(s) of the Document do not by
+this License give permission to use their names for
+publicity for or to assert or imply endorsement of any
+Modified Version.
+
+\medskip
+\begin{center}
+  \textbf{\Large 5. COMBINING DOCUMENTS}
+\end{center}
+
+\noindent
+You may combine the Document with other documents released
+under this License, under the terms defined in section~4
+above for modified versions, provided that you include in
+the combination all of the Invariant Sections of all of
+the original documents, unmodified, and list them all as
+Invariant Sections of your combined work in its license
+notice, and that you preserve all their Warranty
+Disclaimers.
+
+The combined work need only contain one copy of this
+License, and multiple identical Invariant Sections may be
+replaced with a single copy. If there are multiple Invariant
+Sections with the same name but different contents, make the
+title of each such section unique by adding at the end of
+it, in parentheses, the name of the original author or
+publisher of that section if known, or else a unique number.
+Make the same adjustment to the section titles in the list
+of Invariant Sections in the license notice of the combined
+work.
+
+In the combination, you must combine any sections Entitled
+\enquote{History} in the various original documents, forming
+one section Entitled \enquote{History}; likewise combine any
+sections Entitled \enquote{Acknowledgements}, and any
+sections Entitled \enquote{Dedications}. You must delete all
+sections Entitled \enquote{Endorsements}.
+
+\medskip
+\begin{center}
+  \textbf{\Large 6. COLLECTIONS OF DOCUMENTS}
+\end{center}
+
+\noindent
+You may make a collection consisting of the Document and
+other documents released under this License, and replace the
+individual copies of this License in the various documents
+with a single copy that is included in the collection,
+provided that you follow the rules of this License for
+verbatim copying of each of the documents in all other
+respects.
+
+You may extract a single document from such a collection,
+and distribute it individually under this License, provided
+you insert a copy of this License into the extracted
+document, and follow this License in all other respects
+regarding verbatim copying of that document.
+
+\medskip
+\begin{center}
+  \textbf{\Large 7. AGGREGATION WITH INDEPENDENT WORKS}
+\end{center}
+
+\noindent
+A compilation of the Document or its derivatives with other
+separate and independent documents or works, in or on a
+volume of a storage or distribution medium, is called an
+\enquote{aggregate} if the copyright resulting from the
+compilation is not used to limit the legal rights of the
+compilation's users beyond what the individual works permit.
+When the Document is included in an aggregate, this License
+does not apply to the other works in the aggregate which are
+not themselves derivative works of the Document.
+
+If the Cover Text requirement of section~3 is applicable to
+these copies of the Document, then if the Document is less
+than one half of the entire aggregate, the Document's Cover
+Texts may be placed on covers that bracket the Document
+within the aggregate, or the electronic equivalent of covers
+if the Document is in electronic form. Otherwise they must
+appear on printed covers that bracket the whole aggregate.
+
+\medskip
+\begin{center}
+  \textbf{\Large 8. TRANSLATION}
+\end{center}
+
+\noindent
+Translation is considered a kind of modification, so you may
+distribute translations of the Document under the terms of
+section~4. Replacing Invariant Sections with translations
+requires special permission from their copyright holders,
+but you may include translations of some or all Invariant
+Sections in addition to the original versions of these
+Invariant Sections. You may include a translation of this
+License, and all the license notices in the Document, and
+any Warranty Disclaimers, provided that you also include the
+original English version of this License and the original
+versions of those notices and disclaimers. In case of a
+disagreement between the translation and the original
+version of this License or a notice or disclaimer, the
+original version will prevail.
+
+If a section in the Document is Entitled
+\enquote{Acknowledgements}, \enquote{Dedications}, or
+\enquote{History}, the requirement (section~4) to Preserve
+its Title (section~1) will typically require changing the
+actual title.
+
+\medskip
+\begin{center}
+  \textbf{\Large 9. TERMINATION}
+\end{center}
+
+\noindent
+You may not copy, modify, sublicense, or distribute the
+Document except as expressly provided under this License.
+Any attempt otherwise to copy, modify, sublicense, or
+distribute it is void, and will automatically terminate your
+rights under this License.
+
+However, if you cease all violation of this License, then
+your license from a particular copyright holder is
+reinstated (a) provisionally, unless and until the copyright
+holder explicitly and finally terminates your license, and
+(b) permanently, if the copyright holder fails to notify you
+of the violation by some reasonable means prior to 60 days
+after the cessation.
+
+Moreover, your license from a particular copyright holder is
+reinstated permanently if the copyright holder notifies you
+of the violation by some reasonable means, this is the first
+time you have received notice of violation of this License
+(for any work) from that copyright holder, and you cure the
+violation prior to 30 days after your receipt of the
+notice.
+
+Termination of your rights under this section does not
+terminate the licenses of parties who have received copies
+or rights from you under this License. If your rights have
+been terminated and not permanently reinstated, receipt of a
+copy of some or all of the same material does not give you
+any rights to use it.
+
+\medskip
+\begin{center}
+  \textbf{\Large 10. FUTURE REVISIONS OF THIS LICENSE}
+\end{center}
+
+\noindent
+The Free Software Foundation may publish new, revised
+versions of the GNU Free Documentation License from time to
+time. Such new versions will be similar in spirit to the
+present version, but may differ in detail to address new
+problems or concerns. See
+\url{https://www.gnu.org/licenses/}.
+
+Each version of the License is given a distinguishing
+version number. If the Document specifies that a particular
+numbered version of this License \enquote{or any later
+  version} applies to it, you have the option of following
+the terms and conditions either of that specified version or
+of any later version that has been published (not as a
+draft) by the Free Software Foundation. If the Document does
+not specify a version number of this License, you may choose
+any version ever published (not as a draft) by the Free
+Software Foundation. If the Document specifies that a proxy
+can decide which future versions of this License can be
+used, that proxy's public statement of acceptance of a
+version permanently authorizes you to choose that version
+for the Document.
+
+\medskip
+\begin{center}
+  \textbf{\Large 11. RELICENSING}
+\end{center}
+
+\begingroup
+\sloppy
+\noindent
+\enquote{Massive Multiauthor Collaboration Site} (or
+\enquote{MMC Site}) means any World Wide Web server that
+publishes copyrightable works and also provides prominent
+facilities for anybody to edit those works. A public wiki
+that anybody can edit is an example of such a server. A
+\enquote{Massive Multiauthor Collaboration} (or
+\enquote{MMC}) contained in the site means any set of
+copyrightable works thus published on the MMC site.
+\endgroup
+
+\enquote{CC-BY-SA} means the Creative Commons
+Attribution-Share Alike 3.0 license published by Creative
+Commons Corporation, a not-for-profit corporation with a
+principal place of business in San Francisco, California, as
+well as future copyleft versions of that license published
+by that same organization.
+
+\enquote{Incorporate} means to publish or republish a
+Document, in whole or in part, as part of another Document.
+
+An MMC is \enquote{eligible for relicensing} if it is
+licensed under this License, and if all works that were
+first published under this License somewhere other than this
+MMC, and subsequently incorporated in whole or in part into
+the MMC, (1) had no cover texts or invariant sections, and
+(2) were thus incorporated prior to November 1, 2008.
+
+The operator of an MMC Site may republish an MMC contained
+in the site under CC-BY-SA on the same site at any time
+before August 1, 2009, provided the MMC is eligible for
+relicensing.
+
+\medskip
+\begin{center}
+  \textbf{\Large ADDENDUM: How to use this License for your
+    documents}
+\end{center}
+
+\noindent
+To use this License in a document you have written, include
+a copy of the License in the document and put the following
+copyright and license notices just after the title page:
+
+\begin{quote}
+  Copyright \copyright{} YEAR YOUR NAME.
+
+  Permission is granted to copy, distribute and/or modify
+  this document under the terms of the GNU Free
+  Documentation License, Version 1.3 or any later version
+  published by the Free Software Foundation; with no
+  Invariant Sections, no Front-Cover Texts, and no
+  Back-Cover Texts. A copy of the license is included in the
+  section entitled \enquote{GNU Free Documentation
+    License}.
+\end{quote}
+
+If you have Invariant Sections, Front-Cover Texts and
+Back-Cover Texts, replace the \enquote{with \dots\ Texts.}\
+line with this:
+
+\begin{quote}
+  with the Invariant Sections being LIST THEIR TITLES, with
+  the Front-Cover Texts being LIST, and with the Back-Cover
+  Texts being LIST.
+\end{quote}
+
+If you have Invariant Sections without Cover Texts, or some
+other combination of the three, merge those two alternatives
+to suit the situation.
+
+If your document contains nontrivial examples of program
+code, we recommend releasing these examples in parallel
+under your choice of free software license, such as the GNU
+General Public License, to permit their use in free
+software.
\ No newline at end of file