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RationalMaps :: MinorsCount

MinorsCount -- An option controlling the behavior of isBirational and inverseOfMap (and other functions which call those).


One of the ways to invert a map is to find a nonzero minor of a variant of the jacobialDualMatrix. This function controls how many (randomly chosen) minors to check before switching to another strategy (invovling computing a syzygy). Setting it to zero will mean no minors are checked. If it is left as null (the default), the functions will try to make an educated guess as to how big to make this, depending on varieties you are working with.

See also

Functions with optional argument named MinorsCount :

For the programmer

The object MinorsCount is a symbol.