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What’s the Most Abstract Math Concept You’ve Studied?
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1
Set Theory & Cardinality
Infinite sets have different sizes. Wait, what?
166
Votes
18.99%
Proportion
2
Category Theory
Math about math—structures, mappings, and ultimate abstraction.
156
Votes
17.85%
Proportion
3
Proof by Induction
Like dominoes falling forever—prove one, and the rest must follow.
133
Votes
15.22%
Proportion
4
Limits & Infinity
Where numbers go, but never quite arrive. Hello, ∞.
124
Votes
14.19%
Proportion
5
Topology
(A donut is a mug) A world where stretching, twisting, and squishing preserve identity.
99
Votes
11.33%
Proportion
6
Imaginary Numbers
(i = √–1) Numbers that don’t exist on the number line… but solve real problems.
95
Votes
10.87%
Proportion
7
Abstract Algebra
(Groups, Rings, Fields) Math about sets where “+” and “×” don’t always mean what you think.
56
Votes
6.41%
Proportion
8
Non-Euclidean Geometry
Space bends. Lines curve. Triangles don’t add up to 180°. Reality… updated.
45
Votes
5.15%
Proportion
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