Hirzebruch chi(y) genera of the Hilbert schemes of surfaces by localization formula
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We use the Atiyah-Bott-Segal-Singer Lefschetz fixed point formula to calculate the Hirzebruch y genus y(S[n]), where S[n] is the Hilbert scheme of points of length n of a surface S. Combinatorial interpretation of the weights of the fixed points of the natural torus action on (2)[n] is used. This is the first step to prove a conjectural formula about the elliptic genus of the Hilbert schemes.