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When is it the case that all closed immersions of all irreducible components are flat?

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#algebraic-geometry #sheaf-theory #algebraic-curves
70
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Viewing algebraic varieties as Homomorphism

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#algebraic-geometry #commutative-algebra
119
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Homogeneous prime ideals and grade zero elements

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#algebraic-geometry #commutative-algebra
765
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Rational functions on curve

Published on
#geometry #algebraic-geometry
784
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Reference for algebro-geometric definition of the $\cup$-product in (sheaf) cohomology.

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#algebraic-geometry #homology-cohomology #sheaf-cohomology
1.1k
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Morphism from a scheme to the spectra of global section

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#algebraic-geometry #schemes
112
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Can every connected reductive group over a char $p$ field be defined over $\mathbb F_p$?

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#algebraic-geometry #algebraic-groups
257
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Graded global sections of Proj(S) for S a polynomial ring and more general

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#algebraic-geometry #sheaf-theory #schemes #graded-rings #projective-schemes
65
Views

Smooth curves of odd genus

Published on
#algebraic-geometry #algebraic-curves #riemann-surfaces
540
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Why is the radical ideal of the homogenization of an ideal the homogenization of the radical of said ideal?

Published on
#abstract-algebra #algebraic-geometry #ideals
156
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Order of $\operatorname{Gal}(K_s/K_\ell)$

Published on
#algebraic-geometry #galois-theory #algebraic-number-theory
1k
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Algebraic Groups Connected and Reduced?

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#group-theory #algebraic-geometry #algebraic-groups
125
Views

Determining ideals, isomorphic rings of $\Bbb C[x, y]/(y^2 - x^3)$?

Published on
#abstract-algebra #algebraic-geometry #ring-theory
376
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Does the tangent bundle of the projective space split?

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#algebraic-geometry
664
Views

"line at infinity" in projective plane

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#algebraic-geometry #projective-geometry #projective-space

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