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

Algorithm type

3⁢X4⁢Y8⁢Z4+3⁢X4⁢Y6⁢Z4+27⁢X4⁢Y4⁢Z4+18⁢X2⁢Y8⁢Z2+24⁢X2⁢Y6⁢Z2+24⁢X⁢Y8⁢Z+66⁢X2⁢Y4⁢Z2+36⁢X⁢Y6⁢Z+6⁢X2⁢Y3⁢Z2+120⁢X2⁢Y2⁢Z2+36⁢X⁢Y4⁢Z+36⁢X⁢Y3⁢Z+144⁢X⁢Y2⁢Z+132⁢X⁢Y⁢Z3X4Y8Z43X4Y6Z427X4Y4Z418X2Y8Z224X2Y6Z224XY8Z66X2Y4Z236XY6Z6X2Y3Z2120X2Y2Z236XY4Z36XY3Z144XY2Z132XYZ3*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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