Dosiero:Natural trafo.png
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Natural_trafo.png (4KB, MIME type: image/png)
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Diagram illustrating the defining property of natural transformations, produced with the TeX package XYpic using the following source code. Both the image and the source code are released into the public domain.
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Copied from en:Image:Natural_trafo.png, there provied by en:User:AxelBoldt as PD (own creation), contains minor changes by User:Fropuff.
% Produce a postscript file from this input with tex and dvips.
% Loading the XY-Pic package:
\input xy
\xyoption{all}
% Using postscript driver for smoother curves
\xyoption{ps}
\xyoption{dvips}
% No need for page numbers
\nopagenumbers
$$
\xymatrix{ %Our diagram is a 2x2 matrix
F(X)\ar[d]_{\eta_X}\ar[r]^{F(f)} & F(Y)\ar[d]^{\eta_Y}\\
G(X)\ar[r]^{G(f)} & G(Y)
}
$$
\end
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