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How to show that this function is an isomorphisn??

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#algebraic-geometry
75
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$p$-divisible group of tori

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#algebraic-geometry #algebraic-number-theory #algebraic-groups #arithmetic-geometry
225
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Twisting with a degree negative line bundle

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#algebraic-geometry #differential-geometry
3.5k
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Push forward of the structure sheaf along covering

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#algebraic-geometry #reference-request
151
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$\mathbb{P}(O\oplus O(-1))\simeq \mathbb{P}^1\times \mathbb{P}^1$?

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#algebraic-geometry
876
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Why is $W_n(k)$ the unique flat lifting of a perfect field $k$ over $\mathbf{Z}/p^n$?

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#algebraic-geometry #commutative-algebra #positive-characteristic
500
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Ideal generated by a regular sequence

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#algebraic-geometry #ring-theory #commutative-algebra #ideals
95
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Elliptic curves as $\mathbb{C}^*/\mathbb{Z}$

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#algebraic-geometry #elliptic-curves
1.5k
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Equivalent definitions for normal variety

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#algebraic-geometry
299
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How to define a smooth subvariety as the vanishing of local coordinates

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#algebraic-geometry #commutative-algebra
253
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How to determine if an equation is a rational variety?

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#number-theory #algebraic-geometry
2.4k
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Showing Grothendieck's Vanishing Theorem provides a strict bound

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#algebraic-geometry #homology-cohomology #sheaf-theory #sheaf-cohomology
527
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How to determine whether three ellipses have at least one common intersection point or not?

Published on
#geometry #algebraic-geometry
70
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Linearizable reductive group action.

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#algebraic-geometry #affine-geometry
914
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Thinking About Fractional Ideals Geometrically

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#algebraic-geometry #commutative-algebra #soft-question

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