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\begin{tikzpicture} \tkzInit[xmax=1,xstep=0.15,ymax=.5] \tkzAxeX \tkzDrawY[noticks] \tkzDefPoint(0.22,0.25){A} \tkzDrawPoint(A) \tkzLabelPoint[above](A){$A_1$} \end{tikzpicture}