# new ChainComplex -- make a new chain complex from scratch

## Description

C = new ChainComplex -- make a new chain complex.

The new chain complex is initialized with a differential of degree -1 accessible as C.dd and of type ChainComplexMap. You can take the new chain complex and fill in the ring, the modules, and the differentials.

 i1 : C = new ChainComplex; i2 : C.ring = ZZ; i3 : C#2 = ZZ^1; i4 : C#3 = ZZ^2; i5 : C.dd#3 = matrix {{3,-11}}; 1 2 o5 : Matrix ZZ <--- ZZ i6 : C 1 2 o6 = ZZ <-- ZZ 2 3 o6 : ChainComplex i7 : C.dd 1 2 o7 = 2 : ZZ <------------- ZZ : 3 | 3 -11 | o7 : ChainComplexMap