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An exploration of basic number systems including the integers, rationals, reals, complex and beyond.

Prerequisites: Consent of instructor.

1 - 6

Units

Pass no pass

Grading

1, 2, 3

Passtime

None

Level Limit

Creative studies

College
These majors only matcs math
CASTEELS K L
Karel Casteels
4.3
42 reviews
Fall 2025 . Casteels K L
CRST 164B
M W F
11:00 AM - 11:50 AM
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MATH CS 120FN Casteels K L Fall 2024 Total: 13
MATH CS 120FN Casteels K L Fall 2023 Total: 21
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42
4.3
MATHCS120 . Casteels K L 8 Months Ago

This prof would constantly forget to post important things on canvas which can be really annoying when you're trying really hard to get a good grade in the class. Homework is really hard and it just doesn't seem like he gaf. Somewhat funny but makes everything more complicated than they need to be

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MATH117 . Casteels K L 9 Months Ago

He's the one

0 helpful 0 unhelpful
MATH117 . Casteels K L 9 Months Ago

He is GOAT

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MATHCS120 . Casteels K L 11 Months Ago

The game theory class taken with Karel is really fun, the concepts are explained in a way that's easier to understand, and he's also accessible during office hour (a lot of OH). Though sometimes he would forget to post some important stuff (like homework on gradescope, or lecture notes he promised), but the class is really good.

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MATH137A . Casteels K L 1 Year, 10 Months Ago

Very engaging lecturer, great sense of humor. Extremely timely with email repsonses. Grading was homework, 2 midterms, and a final. Holds a lot of office hours. Homework can be tough but he'll help you in OH. Midterms generally easier than homework. Also just a nice guy

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MATH137A . Casteels K L 1 Year, 11 Months Ago

HW 25%, 2 midterms 15% each, 1 final 45%; He's very funny and genuinely helps so much in office hours. Favorite math class at UCSB thus far and only class I ever went to that I waNTed to go to because the course content is fun (he makes it fun). Homework was light (5ish problems per week) and if they're hard, mathlab helps so much.

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See all 42 reviews
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