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math.CO2023
A short proof of Lagrange-Good formula using Dirac delta function
Minh-Toan Nguyen
We give a half-page proof of the Lagrange-Good formula, using the Fourier representation of Dirac delta function.
math.CO2023
Formal construction of some exchangeable structures
Minh-Toan Nguyen
We show that exchangeable structures such as Polya urn model and Chinese restaurant process can be constructed from sets with a real number of elements. From this construction, the…