Curves and surfaces in three-dimensional Euclidean space, including Frenet formulas, signed curvature of plane curves, first and second fundamental forms, normal curvature and principal curvature, Gaussian and mean curvature, Gauss equation and Theorema Egregium, and a brief introduction to geodesics if time permits.

Prerequisites: Math 6A with a minimum grade of C; and Math 108A or 117 with a minimum grade of C.

4

Units

Optional

Grading

1, 2, 3

Passtime

None

Level Limit

Letters and science

College
Unlocks MATH 147B
DAI X Z
Xianzhe Dai
2.5
179 reviews
AI predicted, based on past grading trends of the course and instructor, class info, and 127 other factors
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Spring 2024 . Dai X Z
CHEM 1171
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14:00 PM - 15:15 PM
Spring 2025 . Dai X Z
BUCHN1930
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08:00 AM - 09:15 AM
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MATH 147A Dai X Z Spring 2025 Total: 31
MATH 147A Dai X Z Spring 2024 Total: 41
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179
2.5
147a . Dai X Z 1 Year, 4 Months Ago

I really really like this professor. His lectures were really nice and he made the material approachable. It is a pretty difficult course and you definitely need to spend time outside of class reading the textbook and understanding the material, but the midterm/final were both very fair, though challenging.

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147a . Dai X Z 3 Years Ago

Almost failed his class, dropped halfway through, took it with another professor later and got A. Gives trivial examples in class while homework seem like rocket science. This guy is too busy to accommodate students for extra office hours. Had other classes during his office hours so I had no chance to ask him questions, consequently the near fail.

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147a . Dai X Z 4 Years Ago

hypocritical

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MATH4A . Dai X Z A Month Ago

I had bad experience with him. His lecture is not helpful at all, and he also doesn't care about teaching or students' wellbeing at all - if you're learning or not. And he does not show up office hour. And even if he's there, he's not even helping. Avoid him if you can

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MATH4A . Dai X Z 5 Months Ago

Lectures in a thick accent and mumbles. He goes into long theoretical derivations rather than doing examples. When he does do example problems, he'll skip half the steps and not explain what he's doing. Be prepared to learn everything outside of class if you want to do well. 60% of the grade is the final.

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MATH4A . Dai X Z 6 Months Ago

He has an accent and is a little quiet, so it's difficult to understand him at times. He's nice and caring if you go up to ask for help, but a lot of self-studying is needed to do well on the final.

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