Description of fast matrix multiplication algorithm: ⟨4×12×21:675⟩

Algorithm type

3X4Y8Z4+3X4Y6Z4+27X4Y4Z4+18X2Y8Z2+24X2Y6Z2+24XY8Z+66X2Y4Z2+36XY6Z+6X2Y3Z2+120X2Y2Z2+36XY4Z+36XY3Z+144XY2Z+132XYZ3X4Y8Z43X4Y6Z427X4Y4Z418X2Y8Z224X2Y6Z224XY8Z66X2Y4Z236XY6Z6X2Y3Z2120X2Y2Z236XY4Z36XY3Z144XY2Z132XYZ3*X^4*Y^8*Z^4+3*X^4*Y^6*Z^4+27*X^4*Y^4*Z^4+18*X^2*Y^8*Z^2+24*X^2*Y^6*Z^2+24*X*Y^8*Z+66*X^2*Y^4*Z^2+36*X*Y^6*Z+6*X^2*Y^3*Z^2+120*X^2*Y^2*Z^2+36*X*Y^4*Z+36*X*Y^3*Z+144*X*Y^2*Z+132*X*Y*Z

Algorithm definition

The algorithm ⟨4×12×21:675⟩ is the (Kronecker) tensor product of ⟨2×3×3:15⟩ with ⟨2×4×7:45⟩.

Algorithm description

These encodings are given in compressed text format using the maple computer algebra system. In each cases, the last line could be understood as a description of the encoding with respect to classical matrix multiplication algorithm. As these outputs are structured, one can construct easily a parser to its favorite format using the maple documentation without this software.


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