Linear Algebra 1: Matrix algebra - Oxford Mathematics 1st Year Student Lecture

In this lecture, the second in the first year Linear Algebra 1 course, Andy Wathen address how to add, scale and, crucially, how to multiply matrices.

All first and second year lectures are followed by tutorials where students meet their tutor to go through the lecture and associated problem sheet and to talk and think more about the maths. Third and fourth year lectures are followed by classes.

[garthreid]

Awesome Lecturer. I love Linear Algebra ❤

[irplans]

Why ppl are struggling in class tell them to rest 😑

[scottychen]

This would be the time to explain in lethargically radiative detail:

Why multiplication and addition (of reals: understood as the same as complex numbers) will have the same unit of computational cost in a scheme of matrix arithmetic.


In a turing machine (or otherwise) these are quite not the same thing I’m afraid, in the most explicit sense,

Andy: this is something you would have marked as incorrect.


You’re not wrong about your markings and their identity as one of a gift,

But I can assure you you don’t actually understand what an answer to this question would manifest as….