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Partition Theory

Undergraduate

Definition

Study of ways to represent positive integers as sums of positive integers

Formulas

p(n): partition number of n
Σp(n)xⁿ = ∏1/(1-xᵏ)
Euler identities
Hardy-Ramanujan asymptotic

Examples

Example 1

p(5) = 7: 5=4+1=3+2=3+1+1=...

Example 2

Young diagrams

Applications

Number theory

Representation theory

Physics

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