# \#lattices

**URL:** https://discourse.julialang.org/tag/lattices/934.md

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## [Agents.jl : how to smartly implement Triangular and Hexagonal Grids](https://discourse.julialang.org/t/agents-jl-how-to-smartly-implement-triangular-and-hexagonal-grids/86106)

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**Author:** [@Rouzaire](https://discourse.julialang.org/u/Rouzaire)\
**Replies:** 3\
**Last updated:** [August 23, 2022, 9:19am UTC](https://discourse.julialang.org/t/agents-jl-how-to-smartly-implement-triangular-and-hexagonal-grids/86106 "2022-08-23T09:19:30Z")

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Hello everyone, First of all, I would like to thank the devs for the great piece of work that is Agents.jl . In the world of two dimensional lattice, the square one is ubiquitous in numerical simulations. In this packa…

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## [Bravais lattice with a gaussian at every site](https://discourse.julialang.org/t/bravais-lattice-with-a-gaussian-at-every-site/75055)

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**Author:** [@ash](https://discourse.julialang.org/u/ash)\
**Replies:** 9\
**Last updated:** [January 24, 2022, 7:16pm UTC](https://discourse.julialang.org/t/bravais-lattice-with-a-gaussian-at-every-site/75055 "2022-01-24T19:16:45Z")

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I am trying to generate a numerical initial condition for a PDE that looks like this: it is a Bravais lattice, with a gaussian at each site (in 2D). This is not difficult to do by hand for a square lattice with two atoms…

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## [Using LightGraphs to study ODEproblems](https://discourse.julialang.org/t/using-lightgraphs-to-study-odeproblems/69545)

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**Author:** [@Frazze](https://discourse.julialang.org/u/Frazze)\
**Replies:** 3\
**Last updated:** [October 14, 2021, 10:41am UTC](https://discourse.julialang.org/t/using-lightgraphs-to-study-odeproblems/69545 "2021-10-14T10:41:33Z")

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Hi everyone, I’m studying an ODEProblem where the function have a laplacian operator. #Domain and grid Nx = 40 Ny = 40 lx = 12 ly = 12 # the Laplacian operator function Laplacian2D(Nx, Ny, lx, ly) hx = lx/Nx hy = l…

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## [\[ANN\] Brillouin.jl: k-space utilities for crystalline eigenproblems](https://discourse.julialang.org/t/ann-brillouin-jl-k-space-utilities-for-crystalline-eigenproblems/64597)

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**Author:** [@tchr](https://discourse.julialang.org/u/tchr)\
**Replies:** 6\
**Last updated:** [August 11, 2021, 7:52am UTC](https://discourse.julialang.org/t/ann-brillouin-jl-k-space-utilities-for-crystalline-eigenproblems/64597 "2021-08-11T07:52:22Z")

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I wrote a small’ish package Brillouin.jl that is aimed at making the frequent task of determining and understanding paths and domains in k-space simpler and more streamlined. Specifically, it provides tools to easily: …

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## [\[ANN\] LightLattices.jl - lazy interface to lattices with arbitrary unit cells](https://discourse.julialang.org/t/ann-lightlattices-jl-lazy-interface-to-lattices-with-arbitrary-unit-cells/65493)

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**Author:** [@Gregstrq](https://discourse.julialang.org/u/Gregstrq)\
**Replies:** 1\
**Last updated:** [July 29, 2021, 6:16pm UTC](https://discourse.julialang.org/t/ann-lightlattices-jl-lazy-interface-to-lattices-with-arbitrary-unit-cells/65493 "2021-07-29T18:16:52Z")

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Hi, everyone. This is an announcement for the package LightLattices.jl. It provides the lazy interface to work with lattices. The lattices of arbitrary dimensionality and arbitrary unit cells are supported. Overview Th…

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## [Periodic lattices with LightGraph](https://discourse.julialang.org/t/periodic-lattices-with-lightgraph/60454)

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**Author:** [@Marco\_Antoniotti](https://discourse.julialang.org/u/Marco_Antoniotti)\
**Replies:** 2\
**Last updated:** [May 3, 2021, 1:09pm UTC](https://discourse.julialang.org/t/periodic-lattices-with-lightgraph/60454 "2021-05-03T13:09:20Z")

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Hi just being lazy here… What would be the simplest way to produce a periodic lattice with LightGraphs? I.e. a “cylinder”. Thanks Marco

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## [\[ANN\] DFTK.jl - A pure-Julia implementation of density-functional theory](https://discourse.julialang.org/t/ann-dftk-jl-a-pure-julia-implementation-of-density-functional-theory/40806)

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**Author:** [@mfh](https://discourse.julialang.org/u/mfh)\
**Replies:** 7\
**Last updated:** [June 22, 2020, 5:16pm UTC](https://discourse.julialang.org/t/ann-dftk-jl-a-pure-julia-implementation-of-density-functional-theory/40806 "2020-06-22T17:16:40Z")

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DFTK, the density-functional toolkit, is a Julia package @antoine-levitt and me started about a year ago and now we feel it is time to announce it to the community! The aim of the package is to become a platform for met…