Geodesic
Topological invariants of weighted homogeneous polynomials
Glasgow mathematical journal, Tome 33 (1991) no. 3, pp. 241-245

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Let Rn → R be a weighted homogeneous polynomial such that df(0) = 0, L = {x ∈ Sn−1|f(x) = 0}, and let χ(L) be the Euler characteristic of L. The problem is how to calculate χ(L) in terms of f. 
Szafraniec, Zbigniew. Topological invariants of weighted homogeneous polynomials. Glasgow mathematical journal, Tome 33 (1991) no. 3, pp. 241-245. doi: 10.1017/S0017089500008302
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