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Hyperplanes as dual projective spaces

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#linear-algebra #algebraic-geometry #projective-geometry
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finiteness in étale cohomology (ell-adic sheaves)

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#algebraic-geometry #etale-cohomology
43
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isomorphism in étale cohomology

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#algebraic-geometry #etale-cohomology
533
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Can an open subset of an affine variety and the variety itself have isomorphic rings of regular functions?

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#algebraic-geometry
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Determine Circle of Intersection of Plane and Sphere

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#algebraic-geometry #circles
277
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K[x,y,z,w]/(xw-yz) not UFD

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#abstract-algebra #algebraic-geometry #commutative-algebra
90
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Is the union of all elliptic curves $\mathbb{R}^2$?

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#algebraic-geometry #elliptic-curves #birational-geometry
1.8k
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Finding the cube root of a complex number $z$

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#algebraic-geometry #trigonometry #complex-numbers
579
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Why is $\phi:\mathbb{P}^n\rightarrow \mathbb{P}^m$ constant if dim $\phi(\mathbb{P}^n)<n$?

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#algebraic-geometry #sheaf-theory #projective-geometry
959
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About the fixed part of a linear system

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#algebraic-geometry
92
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How to derive the hyperbola giving the foci and the fixed differene

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#geometry #algebraic-geometry #special-functions
113
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Split extension of linear algebraic groups given by unipotent radicals and reductive groups

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#group-theory #algebraic-geometry #schemes #group-schemes
135
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Why is this variety given by the vanishing of a linear form?

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#algebraic-geometry
219
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When does a variety have a point over a finite field for sufficiently large primes p?

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#number-theory #algebraic-geometry #arithmetic-geometry
188
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morphism of a variety onto affine space with an infinite fiber

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#abstract-algebra #algebraic-geometry

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