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Illustration of defining property of projective modules. The file was created by Axel Boldt with the Xy-Pic package for TeX; it is in the public domain. The source code, also in the public domain, was the following:
% 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
$$
\xymatrix{ %Our diagram is a 2x2 matrix with the upper left entry emtpy
& N\ar@{->>}[d]^f\\
P\ar@{.>}[ur]^{\exists h}\ar[r]^g & M
}
$$
\end
File:Projective-module-P.svg is a vector version of this file. It should be used in place of this PNG file when not inferior.
This work has been released into the public domain by its author, AxelBoldt. This applies worldwide.
In some countries this may not be legally possible; if so: AxelBoldt grants anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.
La bildo estas kopiita de wikipedia:en. La originala priskribo estas: Illustration of defining property of projective modules. The file was created by Axel Boldt with the Xy-Pic package for TeX; it is in the public domain. The source code, also i