# Levels in algebra and topology.

Commentarii mathematici Helvetici (1984)

- Volume: 59, page 376-424
- ISSN: 0010-2571; 1420-8946/e

## Access Full Article

top## How to cite

topLam, T.Y., and Dai, Z.D.. "Levels in algebra and topology.." Commentarii mathematici Helvetici 59 (1984): 376-424. <http://eudml.org/doc/139983>.

@article{Lam1984,

author = {Lam, T.Y., Dai, Z.D.},

journal = {Commentarii mathematici Helvetici},

keywords = {topological spaces with involution; level; colevel; sublevel; affine varieties; Hopf problem; equivariant maps; Stiefel manifolds; Borsuk-Ulam theorem; topology of spheres; arithmetic of sums of squares in rings; quadratic forms; Pythagoras number; invariants; Radon-Hurwitz number; isotropic form; ring of continuous functions; anisotropic form},

pages = {376-424},

title = {Levels in algebra and topology.},

url = {http://eudml.org/doc/139983},

volume = {59},

year = {1984},

}

TY - JOUR

AU - Lam, T.Y.

AU - Dai, Z.D.

TI - Levels in algebra and topology.

JO - Commentarii mathematici Helvetici

PY - 1984

VL - 59

SP - 376

EP - 424

KW - topological spaces with involution; level; colevel; sublevel; affine varieties; Hopf problem; equivariant maps; Stiefel manifolds; Borsuk-Ulam theorem; topology of spheres; arithmetic of sums of squares in rings; quadratic forms; Pythagoras number; invariants; Radon-Hurwitz number; isotropic form; ring of continuous functions; anisotropic form

UR - http://eudml.org/doc/139983

ER -

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