A new proof is given for the identity equating the 2m(2m+1)-th power of the triangular-number generating function with an indefinite theta series involving the polynomial V_m.
Gorelik, Weyl denominator identity for affine Lie superalgebras with non-zero dual Coxeter number, J
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Denominator identity for the affine Lie superalgebra $\widehat{\mathfrak{spo}}(2m,2m+1)$ and indefinite theta functions
A new proof is given for the identity equating the 2m(2m+1)-th power of the triangular-number generating function with an indefinite theta series involving the polynomial V_m.