MATH 121Introduction to Topology
Mathematics · 4 units · Undergraduate upper division (100-199)
Metric and topological spaces, completeness, compactness, connectedness, functions, continuity, homeomorphisms, topological properties.
When it runs
- Spring 2026
- Spring 2027
Scheduled, not typical — from UCLA’s Schedule of Classes, which publishes Fall 2025 through Spring 2027 and nothing before it.
Requisites
Official UCLA wording
Requisite: course 131A.
BruinTree reads · Prerequisite
confidence 1.00 · from textRequires
Everything that has to come before this course, not just the courses named in the requisite above.
MATH 121
1 direct requisite. Showing 6 courses over 3 levels; the branches marked with a count carry on past it. Every course here opens its own tree.
Unlocks
What this course is a requisite for, and what those courses lead to in turn.
MATH 121
- MATH 240Methods of Set Theory
- MATH 245AReal Analysis
- MATH 245BReal Analysis
- MATH 253BSeveral Complex Variables
- MATH 254ATopics in Real Analysis
- MATH 255AFunctional Analysis
- MATH 255BTopics in Functional Analysis
- MATH 255CTopics in Functional Analysis
- MATH 256ATopological Groups and Their Representations
- MATH 256BTopological Groups and Their Representations
- MATH 259AOperator Algebras in Hilbert Space
- MATH 259BOperator Algebras in Hilbert Space
- MATH 268CTopics in Applied Functional Analysis
- MATH 245CReal Analysis
4 courses list this as a requisite. The whole downstream is here — 29 courses over 3 levels. Every course here opens its own tree.