Discrepancy in MatMul Slides vs. Demo

[werrah]

In the Lecture 8 slides, the final line in MatMul is C[ i * N + j ] += A[ i * N +k ] * B[ k * N + j ]. That first and last N should be K, correct? In the demo, that line is changed to C[ K * i + j ] += A[ N * i +k ] * B[ K * k + j ]. When I was working it out by hand so it would make sense in my head, the demo code made sense, but the lecture slides didn't. Is that a mistake in the slides, or is there something I'm missing that would explain whey the two are different?

[cswiercz]

You are absolutely correct. There was a typo (two, in fact) in the lecture slides. I will upload a correction.

[cswiercz]

Corrections uploaded. I will notify the class along with the quiz reminder.