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Unimodular lattice

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#abstract-algebra #modules #integer-lattices
180
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Number of ways to choose a closed path of given length on a square lattice

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#combinatorics #combinations #polygons #combinatorial-geometry #integer-lattices
44
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Does E8 sphere packing proof use a computer

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#integer-lattices
179
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lattices in the complex plane from 3 elements

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#complex-numbers #integer-lattices #free-modules
197
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The automorphism group of the lattice $E_6$

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#lie-algebras #integer-lattices #root-systems #weyl-group
411
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How to calculate the Möbius function of a poset using Hall's theorem

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#combinatorics #integer-lattices #mobius-function
148
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Is Pick's formula true for a general (non-integer-vertices) lattice?

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#integer-lattices
233
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Which root lattices have a theta series with this property?

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#modular-forms #integer-lattices #arithmetic-functions #root-systems #theta-functions
226
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Reference Request: Convergence of Series over Integer Lattice

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#convergence-divergence #reference-request #integer-lattices
4.8k
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Number of lattice points inside a circle

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#combinatorics #integer-lattices
40
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Upper bound on the number of fixed length, self avoiding paths between two points on a 2D grid

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#combinatorics #graph-theory #random-walk #integer-lattices
105
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Prove with geometry: $\lfloor\frac{p}{q}\rfloor+\lfloor\frac{2p}{q}\rfloor+\cdots+\lfloor\frac{(q-1)p}{q}\rfloor=(p-1)(q-1)/2$, for coprime $p$, $q$

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#geometry #ceiling-and-floor-functions #integer-lattices
70
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Find $1 \le a < b \le n$ such that $a\cdot b + a + b = n\cdot (n+1)/2$

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#algebra-precalculus #polynomials #diophantine-equations #integer-lattices
226
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LLL for quadratic forms

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#algorithms #integer-lattices #diophantine-approximation
625
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How to calculate area of triangle-like structure of blocks? (Pick's Theorem seems insufficient.)

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#triangles #area #integer-lattices

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