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References to 'quadratic map'
1. composition algebra by Algeboy
2. even lattice by monster
3. isotropic quadratic space by CWoo
4. quadratic form by CWoo
5. quadratic Jordan algebra by Algeboy
6. quadratic Julia set by PrimeFan
7. quadratic variation by gel
8. quadratic variation of a semimartingale by gel
9. sectional curvature determines Riemann curvature tensor by kerwinhui