Group theory, ring and module theory, field theory, Galois theory, other topics.

Prerequisites: Mathematics 108A-B and 111A-B.

4

Units

Optional

Grading

1, 2, 3

Passtime

None

Level Limit

Letters and science

College
Unlocks MATH 225A MATH 237A MATH 237C
David Morrison
1.8
40 reviews
Francesc Castella
4.5
24 reviews
Fall 2025 . T B A
GIRV 2123
T R
09:30 AM - 10:45 AM
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MATH 220A Castella-Cabe Fall 2024 Total: 22
MATH 220A Castella-Cabe Fall 2019 Total: 29
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64
3.15
220A . 5 Years Ago

Francesc was great for group theory! I'm really happy he's teaching the entire grad algebra sequence this year.

0 helpful 0 unhelpful
MATH4A . 5 Months Ago

The math department just verified that the prof never graded midterms, finals, or HWs and randomly assigned grades off of a single webwork assignment. Check UCSB Reddit for the entire email sent by math dept.

0 helpful 0 unhelpful
MATH4A . 10 Months Ago

do NOT let this man teach anymore LOL, gave up on hwk like a month in and just.. never graded anything except the seatings (my final grade on canvas was about 1% lol), the tests were a mess (especially the first midterm), yeah wouldn't recommend him if you genuinely wanna learn about linear algebra because i know i didn't learn too much with him

1 helpful 0 unhelpful
MATH4A . 10 Months Ago

He just released the final grades nearly two weeks after the deadline. He did not grade any tests, and I strongly believe that he just randomly assigned grades. I emailed him asking to see my test results, and also plan on emailing the math department if needed. Please avoid him at all costs, this is the worst class I've ever taken.

8 helpful 0 unhelpful
MATH4A . 10 Months Ago

Thanks professor Morrison

0 helpful 3 unhelpful
MATH4A . 10 Months Ago

He grade slow, but honestly he teach well!!! I am taking 4b now, compare to my 4b professor, prof Morrison teach really good. The exam is kind of hard, but if you do study, at least you will know 1/2 of question. He curve, he did care student's grades. thanks professor, you just grade too slow that why yours rate is low.

0 helpful 5 unhelpful
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