Release of SINGULAR 3-1-5

News for version 3-1-5

New data types

• bigintmat ( bigintmat) (experimental)
• fan ( fan) improved ( fan related functions)
• cone ( cone) improved ( cone related functions)
• polytope( polytope) improved ( polytope related functions)
• user defined type( User defined types): many improvements

Changed SINGULAR commands

• sqrfree: ( sqrfree): changed implementation, arguments, return type

New SINGULAR libraries

• new library: locnormal.lib: Normalization of affine domains using local methods ( locnormal_lib)
• new library: modnormal.lib: Normalization of affine domains using modular methods ( modnormal_lib)
• new library: realizationMatroids.lib: Deciding Relative Realizability for Tropical Fan Curves in 2-Dimensional Matroidal Fans ( realizationMatroids_lib)

Changed SINGULAR libraries

• renamed polymake.lib to oldpolymake.lib ( oldpolymake_lib)

Interface to gfanlib/polymake

• use gfanlib via fan/cone/polytope
• use polymake via polymake.so

Internal Changes

• factorization code for extension fields improved