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Université Paris Diderot (Paris 7)

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Top Questions
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32
What's an example of a transcendental power series?
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30
Why is differential Galois theory not widely used?
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25
What elementary problems can you solve with schemes?
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23
nontrivial theorems with trivial proofs
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23
How many flat connections has a line bundle in algebraic geometry?
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22
Concrete Applications of knowing $\mathrm{Gal}(\bar{\mathbb{Q}}/\mathbb{Q})$
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19
What are some famous rejections of correct mathematics?
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18
Covering maps in real life that can be demonstrated to students
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18
Solving algebraic problems with topology
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16
applications of Berkovich spaces
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16
Algebraic analogue of the Moebius bundle over the circle
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16
Which nonlinear PDEs are of interest to algebraic geometers and why?
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15
Pseudonyms of famous mathematicians
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15
Math puzzles for dinner
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15
An apparent equivalence of the category of affine schemes over $S$ and the category of quasi-coherent $\mathcal{O}_S$-algebras
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14
What is the precise relationship between o-minimal theory and Grothendieck's “Esquisse d'un programme”?
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14
Are rational varieties simply connected?
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14
An algebraic number is not a root of unity?
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13
Topological characterization of the closed interval $[0,1]$
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13
A slick proof of the Bruhat Decomposition for GL_n(k)?
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13
Analogies between classical geometry on complex surfaces and Arakelov geometry
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12
What does it mean that $[X]+[Y]=0$ in the Grothendieck ring of varieties?
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12
“Role” of cohomology of coherent sheaves in SGA 4.5, étale cohomology
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12
$\mathbb{P}^n$ is simply connected
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12
Are there nonobvious cases where equations have finitely many algebraic integer solutions?
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12
About the pro-algebraic group structure of $G(\mathbb{C}[[t]])$
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11
p-adic Stein spaces
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11
Blow-ups and blow-downs
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11
Can Liouville's number be expressed as a physical ratio in the sense that $\pi$ is?
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11
What sets of primes can we pick out with first-order statements?
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