PolymorphismPrince t1_ismf6h6 wrote on October 17, 2022 at 1:48 AM

Reply to comment by mcilrain in DeepMind breaks 50-year math record using AI; new record falls a week later by Melodic-Work7436

Matrix multiplication is taking the dot product of every row with every column.

mcilrain t1_ismffnr wrote on October 17, 2022 at 1:50 AM

I don't know what a dot product is, I tried googling it and it spat greek at me.

PolymorphismPrince t1_ismncj6 wrote on October 17, 2022 at 2:52 AM

For example, to find the entry in row 4 and column 3 of the matrix you get out of the product, you take all the entries in the fourth row of the first matrix, all the entries in the 3rd column of the second matrix, multiply those lists together in the way you were talking about in your comment, and then add up all those multiplications.