MATH 205B

Number Theory

Mathematics · 4 units · Graduate courses (200-299)

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Algebraic number theory, including ideal theory, valuations, local fields, cyclotomic fields. Introduction to class-field theory, analytic number theory, L-functions and class number formulas, and modular forms.

S/U or letter grading.

When it runs

Winter 2026
Winter 2027

Scheduled, not typical — from UCLA’s Schedule of Classes, which publishes Fall 2025 through Spring 2027 and nothing before it.

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Requisites

Official UCLA wording
Requisites: courses 210A, 246A.

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Requires

Everything that has to come before this course, not just the courses named in the requisite above.

MATH 205B

MATH 210AAlgebra
- MATH 110AAlgebra
  - MATH 115ALinear Algebra1 more beneath
- MATH 110BAlgebra
  - MATH 110AAlgebraanother path to it
  - MATH 117Algebra for Applications

2 direct requisites. Showing 17 courses over 3 levels; the branches marked with a count carry on past it. Every course here opens its own tree.

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What this course is a requisite for, and what those courses lead to in turn.

No course in the catalog lists this as a requisite.