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<head><title>ChainComplex ++ ChainComplex -- direct sum</title>
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<div><h1>ChainComplex ++ ChainComplex -- direct sum</h1>
<div class="single"><h2>Synopsis</h2>
<ul><li><span>Operator: <a href="__pl_pl.html" title="a binary operator, usually used for direct sum">++</a></span></li>
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<div class="single"><h2>Description</h2>
<div><tt>C++D</tt> -- direct sum of chain complexes and maps<table class="examples"><tr><td><pre>i1 : C = resolution cokernel matrix {{4,5}}
1 1
o1 = ZZ <-- ZZ
0 1
o1 : ChainComplex</pre>
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<tr><td><pre>i2 : C ++ C[-2]
1 1 1 1
o2 = ZZ <-- ZZ <-- ZZ <-- ZZ
0 1 2 3
o2 : ChainComplex</pre>
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