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2020 <!-- Header -->
2121 < header id ="header ">
22- < h1 > < a href ="index.html "> < strong > Multiverse </ strong > by HTML5 UP </ a > </ h1 >
22+ < h1 > < a href ="index.html "> < strong > EXP </ strong > Collaboration </ a > </ h1 >
2323 < nav >
2424 < ul >
2525 < li > < a href ="#footer " class ="icon solid fa-info-circle "> About</ a > </ li >
@@ -31,8 +31,18 @@ <h1><a href="index.html"><strong>Multiverse</strong> by HTML5 UP</a></h1>
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3333 < a href ="images/fulls/01.jpg " class ="image "> < img src ="images/thumbs/01.jpg " alt ="" /> </ a >
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35- < p > Nunc blandit nisi ligula magna sodales lectus elementum non. Integer id venenatis velit.</ p >
34+ < h2 > What is a basis function expansion? </ h2 >
35+ < p > A basis function expansion (BFE) uses relatively simple equations to represent a more complex
36+ distribution. Each term in the expansion is given a weight such that the sum of the functions
37+ optimally represents the given distribution. In our case, we use BFEs to represent the
38+ gravitational potential and mass distribution of the dark matter (and/or baryons) in a galaxy.
39+ We tailor the expansion such that the zeroth order term represents the equilibrium state of the galaxy.
40+ The BFE framework is a powerful tool for analyses of galactic dynamics and disequilibrium dynamics, in
41+ particular. The EXP collaboration is built around the shared vision of developing these tools for galactic
42+ dynamics, combining the varied expertise of its members to learn about disequilibrium dynamics in galaxies.
43+ The publicly-available < a href ="https://github.com/EXP-code "> EXP code</ a > . was developed to help achieve
44+ this task. As evidenced in the following pages, there are a number of use cases for BFE analysis framework,
45+ and members of our collaboration have used BFEs to provide profound insight into a variety of problems. </ p >
3646 </ article >
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3848 < a href ="images/fulls/02.jpg " class ="image "> < img src ="images/thumbs/02.jpg " alt ="" /> </ a >
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