DegreeZeroMapGenerator Class Reference

View of one cell of a SchreyerFrame as the degree-zero (scalar) part of the differential between two homological levels. More...

Classes
class	iterator
	Column iterator over the parent DegreeZeroMapGenerator's degree-zero submap. More...

Public Member Functions
	DegreeZeroMapGenerator (SchreyerFrame &C, int slanted_degree, int lev)
const Ring *	ring () const
int	numRows () const
int	numColumns () const
long	numNonzero () const
iterator	begin ()
iterator	end ()

Private Attributes
SchreyerFrame &	mSchreyerFrame
std::vector< SchreyerFrameTypes::FrameElement > &	mThisLevel
int	mDegree
int	mLevel
int	mNumRows
int	mNumColumns
std::vector< int >	mComponentTranslation

Friends
class	DegreeZeroMapGenerator::iterator

Detailed Description

View of one cell of a SchreyerFrame as the degree-zero (scalar) part of the differential between two homological levels.

Note

AI-generated documentation. Verify against the source before relying on it.

Constructed with the source frame C, a slanted_degree, and a homological level lev. Computes how many rows and columns the degree-zero submap has and builds mComponentTranslation, a per-previous-level array mapping each previous-level component to its row in the submap (or -1 for ones at the wrong degree). numNonzero walks every syzygy at this cell and counts the entries that survive the translation; the nested iterator (see below) walks them in column-major order.

Definition at line 397 of file res-f4-m2-interface.cpp.

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The documentation for this class was generated from the following file:

• Macaulay2/e/schreyer-resolution/res-f4-m2-interface.cpp