 Dyson constant-term identity

ID: dyson-constant-term-identity

For nonnegative integers

a_{1}, \dots, a_{n}

CT \prod_{i = 1}^{n} \prod_{j \neq = i} (1 - \frac{X _{i}}{X _{j}})^{a_{i}} = \frac{( a _{1} + \dots + a _{n} )!}{a _{1} ! \dots a _{n} !} .

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