File:Two long exact sequences.png

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A commutative diagram showing two long exact sequences. Created by Xy-Pic using the source code below. Both the image and the source code are in the public domain.

% 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

$$
\xymatrix{ %Our diagram is a 2x7 matrix
 0\ar[r]& F(A_1)\ar[d]_{F(\alpha)}\ar[r]^{F(f_1)} & F(B_1)\ar[d]_{F(\beta)}\ar[r]^{F(g_1)}&
 F(C_1)\ar[d]_{F(\gamma)}\ar[r]&R^1\!F(A_1)\ar[d]_{R^1\!F(\alpha)}\ar[r]^{R^1\!F(f_1)} & R^1\!F(B_1)\ar[d]_{R^1\!F(\beta)}\ar[r]^{R^1\!F(g_1)}&
 R^1\!F(C_1)\ar[d]_{R^1\!F(\gamma)}\ar[r]&R^2F(A_1)\ar[d]_{R^2\!F(\alpha)}\ar[r]^{R^2\!F(f_1)}&\cdots\\
 0\ar[r]& F(A_2)\ar[r]^{F(f_2)} & F(B_2)\ar[r]^{F(g_2)}& F(C_2)\ar[r]&R^1\!F(A_2)\ar[r]^{R^1\!F(f_2)} & R^1\!F(B_2)\ar[r]^{R^1\!F(g_2)}& R^1\!F(C_2)\ar[r]&R^2\!F(A_2)\ar[r]^{R^2\!F(f_2)}&\cdots
}
$$

\end

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• (del) (cur) 21:09, 17 January 2004 . . en:User:AxelBoldt AxelBoldt ( en:User_talk:AxelBoldt Talk) . . 698x105 (4428 bytes)