Description of fast matrix multiplication algorithm: ⟨8×20×32:3021⟩

Algorithm type

16⁢X4⁢Y10⁢Z4+64⁢X4⁢Y8⁢Z4+16⁢X4⁢Y6⁢Z4+112⁢X2⁢Y10⁢Z2+176⁢X4⁢Y4⁢Z4+96⁢X2⁢Y8⁢Z2+129⁢X2⁢Y6⁢Z2+41⁢X2⁢Y5⁢Z2+248⁢X2⁢Y4⁢Z2+2⁢X⁢Y6⁢Z+40⁢X2⁢Y3⁢Z2+232⁢X⁢Y5⁢Z+617⁢X2⁢Y2⁢Z2+207⁢X⁢Y4⁢Z+9⁢X⁢Y3⁢Z2+2⁢X3⁢Y⁢Z+264⁢X⁢Y3⁢Z+18⁢X⁢Y2⁢Z2+8⁢X2⁢Y⁢Z+197⁢X⁢Y2⁢Z+3⁢X⁢Y⁢Z2+524⁢X⁢Y⁢Z16X4Y10Z464X4Y8Z416X4Y6Z4112X2Y10Z2176X4Y4Z496X2Y8Z2129X2Y6Z241X2Y5Z2248X2Y4Z22XY6Z40X2Y3Z2232XY5Z617X2Y2Z2207XY4Z9XY3Z22X3YZ264XY3Z18XY2Z28X2YZ197XY2Z3XYZ2524XYZ16*X^4*Y^10*Z^4+64*X^4*Y^8*Z^4+16*X^4*Y^6*Z^4+112*X^2*Y^10*Z^2+176*X^4*Y^4*Z^4+96*X^2*Y^8*Z^2+129*X^2*Y^6*Z^2+41*X^2*Y^5*Z^2+248*X^2*Y^4*Z^2+2*X*Y^6*Z+40*X^2*Y^3*Z^2+232*X*Y^5*Z+617*X^2*Y^2*Z^2+207*X*Y^4*Z+9*X*Y^3*Z^2+2*X^3*Y*Z+264*X*Y^3*Z+18*X*Y^2*Z^2+8*X^2*Y*Z+197*X*Y^2*Z+3*X*Y*Z^2+524*X*Y*Z

Algorithm definition

The algorithm ⟨8×20×32:3021⟩ is serendipitous tensor product (⟨2×5×8:63⟩ - 19) ⊗ ⟨4×4×4:48⟩ +⟨4×4×12:141⟩ +8⟨4×4×8:96⟩.

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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