Description of fast matrix multiplication algorithm: ⟨4×16×32:1318⟩

Algorithm type

X2Y16Z2+X4Y11Z4+X2Y15Z2+XY16Z2+XY16Z+3XY15Z+6X4Y8Z4+4X2Y12Z2+XY14Z+X2Y11Z2+2X4Y6Z4+X2Y10Z2+10XY12Z+XY11Z2+2XY11Z+70X4Y4Z4+31X2Y8Z2+4X2Y7Z3+5XY10Z+16X2Y7Z2+14XY9Z+62X2Y6Z2+2X2Y4Z4+27XY8Z+XY7Z2+5XY7Z+102X2Y4Z2+X2Y2Z4+42XY6Z+4XY5Z2+10X2Y3Z2+XY5Z+8XY4Z2+257X2Y2Z2+67XY4Z+10XY3Z2+129XY3Z+148XY2Z+5XYZ2+261XYZX2Y16Z2X4Y11Z4X2Y15Z2XY16Z2XY16Z3XY15Z6X4Y8Z44X2Y12Z2XY14ZX2Y11Z22X4Y6Z4X2Y10Z210XY12ZXY11Z22XY11Z70X4Y4Z431X2Y8Z24X2Y7Z35XY10Z16X2Y7Z214XY9Z62X2Y6Z22X2Y4Z427XY8ZXY7Z25XY7Z102X2Y4Z2X2Y2Z442XY6Z4XY5Z210X2Y3Z2XY5Z8XY4Z2257X2Y2Z267XY4Z10XY3Z2129XY3Z148XY2Z5XYZ2261XYZX^2*Y^16*Z^2+X^4*Y^11*Z^4+X^2*Y^15*Z^2+X*Y^16*Z^2+X*Y^16*Z+3*X*Y^15*Z+6*X^4*Y^8*Z^4+4*X^2*Y^12*Z^2+X*Y^14*Z+X^2*Y^11*Z^2+2*X^4*Y^6*Z^4+X^2*Y^10*Z^2+10*X*Y^12*Z+X*Y^11*Z^2+2*X*Y^11*Z+70*X^4*Y^4*Z^4+31*X^2*Y^8*Z^2+4*X^2*Y^7*Z^3+5*X*Y^10*Z+16*X^2*Y^7*Z^2+14*X*Y^9*Z+62*X^2*Y^6*Z^2+2*X^2*Y^4*Z^4+27*X*Y^8*Z+X*Y^7*Z^2+5*X*Y^7*Z+102*X^2*Y^4*Z^2+X^2*Y^2*Z^4+42*X*Y^6*Z+4*X*Y^5*Z^2+10*X^2*Y^3*Z^2+X*Y^5*Z+8*X*Y^4*Z^2+257*X^2*Y^2*Z^2+67*X*Y^4*Z+10*X*Y^3*Z^2+129*X*Y^3*Z+148*X*Y^2*Z+5*X*Y*Z^2+261*X*Y*Z

Algorithm definition

The algorithm ⟨4×16×32:1318⟩ is serendipitous tensor product (⟨2×4×8:51⟩ - 17) ⊗ ⟨2×4×4:26⟩ +⟨2×4×12:77⟩ +7⟨2×4×8:51⟩.

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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