<?xml version="1.0" encoding="UTF-8"?>
<!-- generator="wordpress.com" -->
<urlset xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.sitemaps.org/schemas/sitemap/0.9" xmlns:image="http://www.google.com/schemas/sitemap-image/1.1" xsi:schemaLocation="http://www.sitemaps.org/schemas/sitemap/0.9 http://www.sitemaps.org/schemas/sitemap/0.9/sitemap.xsd"><url><loc>https://astrophytheory.com/mathematical-topics-in-physics/</loc><lastmod>2025-12-23T02:53:36+00:00</lastmod><changefreq>weekly</changefreq><priority>0.6</priority></url><url><loc>https://astrophytheory.com/2020/08/02/open-covers-finite-subcovers-and-compactness/</loc><lastmod>2025-12-23T02:42:23+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://astrophytheory.com/2023/12/20/manifolds-a-second-glance/</loc><image:image><image:loc>https://astrophytheory.com/wp-content/uploads/2021/07/pexels-photo-1629236.jpeg</image:loc><image:title>blue and red galaxy artwork</image:title><image:caption>Photo by Suzy Hazelwood on &lt;a href="https://www.pexels.com/photo/blue-and-red-galaxy-artwork-1629236/" rel="nofollow"&gt;Pexels.com&lt;/a&gt;</image:caption></image:image><lastmod>2023-12-21T07:44:59+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://astrophytheory.com/2018/03/04/method-of-successive-approximations-elementary-methods-to-solving-integral-equations/</loc><lastmod>2021-10-17T23:27:56+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://astrophytheory.com/2021/02/18/a-very-brief-introduction-to-measure-theory-and-the-lebesgue-integral-part-i/</loc><image:image><image:loc>https://astrophytheory.com/wp-content/uploads/2021/01/pexels-photo-1252890.jpeg</image:loc><image:title>milky way galaxy during nighttime</image:title><image:caption>Photo by Hristo Fidanov on &lt;a href="https://www.pexels.com/photo/milky-way-galaxy-during-nighttime-1252890/" rel="nofollow"&gt;Pexels.com&lt;/a&gt;</image:caption></image:image><lastmod>2021-02-19T03:03:26+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://astrophytheory.com/2017/10/12/solution-to-laplaces-equation/</loc><lastmod>2020-11-14T03:24:37+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://astrophytheory.com/2020/05/28/convergent-sequences-cauchy-sequences-completeness/</loc><lastmod>2020-06-29T02:13:15+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://astrophytheory.com/2020/05/28/introduction-to-metric-spaces/</loc><lastmod>2020-05-29T22:43:39+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://astrophytheory.com/2019/11/01/introduction-to-groups/</loc><lastmod>2020-03-07T03:05:38+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://astrophytheory.com/2019/03/15/a-problem-in-thermodynamics-and-statistical-mechanics-analytical-and-numerical-study-of-an-einstein-solid-analytical-solution/</loc><image:image><image:loc>https://astrophytheory.com/wp-content/uploads/2019/03/heat-capacity-plot.jpg</image:loc><image:title>Heat Capacity Plot</image:title></image:image><lastmod>2019-03-16T01:05:18+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://astrophytheory.com/2018/11/16/basics-of-tensor-calculus-general-relativitya-digression-into-special-relativity/</loc><image:image><image:loc>https://astrophytheory.com/wp-content/uploads/2018/11/lorentztransformation01.gif</image:loc><image:title>LorentzTransformation01</image:title></image:image><image:image><image:loc>https://astrophytheory.com/wp-content/uploads/2018/11/nasa-warp-drive.jpg</image:loc><image:title>nasa-warp-drive</image:title></image:image><lastmod>2018-11-16T21:26:47+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://astrophytheory.com/2018/09/23/basics-of-tensor-calculus-and-general-relativity-an-introduction-to-manifolds-and-coordinates/</loc><lastmod>2018-09-24T01:21:39+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://astrophytheory.com/2018/08/17/derivation-of-the-euler-lagrange-equation-for-a-function-of-several-dependent-variables/</loc><lastmod>2018-09-06T00:33:12+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://astrophytheory.com/archive/</loc><lastmod>2018-08-08T03:09:04+00:00</lastmod><changefreq>weekly</changefreq><priority>0.6</priority></url><url><loc>https://astrophytheory.com/astrophysics-cosmology/</loc><lastmod>2018-08-07T00:25:42+00:00</lastmod><changefreq>weekly</changefreq><priority>0.6</priority></url><url><loc>https://astrophytheory.com/2018/08/06/astrophysics-series-derivation-of-the-total-energy-of-a-binary-orbit/</loc><lastmod>2018-08-07T00:17:02+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://astrophytheory.com/2018/07/06/a-proof-of-the-sturm-liouville-theorem-problem/</loc><image:image><image:loc>https://astrophytheory.com/wp-content/uploads/2018/06/psi.jpg</image:loc><image:title>psi</image:title></image:image><image:image><image:loc>https://astrophytheory.com/wp-content/uploads/2018/06/pia01384_medium.jpg</image:loc><image:title>PIA01384_medium</image:title></image:image><lastmod>2018-07-22T03:39:55+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://astrophytheory.com/2018/07/18/a-problem-in-thermodynamics-and-statistical-mechanics-analytical-and-numerical-study-of-an-einstein-solid/</loc><image:image><image:loc>https://astrophytheory.com/wp-content/uploads/2018/07/einsteinsolid_graphs_2.jpg</image:loc><image:title>EinsteinSolid_Graphs_2</image:title></image:image><image:image><image:loc>https://astrophytheory.com/wp-content/uploads/2018/07/einsteinsolid_graphs_1.jpg</image:loc><image:title>EinsteinSolid_Graphs_1</image:title></image:image><image:image><image:loc>https://astrophytheory.com/wp-content/uploads/2018/07/phptcs1nq.png</image:loc><image:title>phptcs1Nq</image:title></image:image><image:image><image:loc>https://astrophytheory.com/wp-content/uploads/2018/07/einsol2.gif</image:loc><image:title>einsol2</image:title></image:image><image:image><image:loc>https://astrophytheory.com/wp-content/uploads/2018/07/einstein_solid.gif</image:loc><image:title>EINSTEIN_SOLID</image:title></image:image><lastmod>2018-07-18T20:45:37+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://astrophytheory.com/2018/06/24/a-narrow-technical-problem-in-partial-differential-equations/</loc><lastmod>2018-07-05T15:38:52+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://astrophytheory.com/2017/08/31/an-introduction/</loc><image:image><image:loc>https://astrophytheory.com/wp-content/uploads/2017/08/moon_astronomy_club.jpg</image:loc><image:title>Moon_Astronomy_Club</image:title></image:image><lastmod>2018-06-24T16:26:03+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://astrophytheory.com/research-in-radiative-transfer/</loc><lastmod>2018-06-24T15:53:40+00:00</lastmod><changefreq>weekly</changefreq><priority>0.6</priority></url><url><loc>https://astrophytheory.com/2018/06/19/observing-the-variable-star-w-ursae-majoris/</loc><image:image><image:loc>https://astrophytheory.com/wp-content/uploads/2018/03/uma_newprocessed_1.jpg</image:loc><image:title>UMA_newprocessed_1</image:title></image:image><image:image><image:loc>https://astrophytheory.com/wp-content/uploads/2018/02/ew-uma-light-curve.jpg</image:loc><image:title>EW UMa light curve</image:title></image:image><lastmod>2018-06-20T14:29:38+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://astrophytheory.com/2018/05/21/derivation-of-the-finite-difference-equations/</loc><image:image><image:loc>https://astrophytheory.com/wp-content/uploads/2018/05/image0004-19-52-12.jpg</image:loc><image:title>Image0004 19-52-12</image:title></image:image><image:image><image:loc>https://astrophytheory.com/wp-content/uploads/2018/05/image0005-19-53-42.jpg</image:loc><image:title>Image0005 19-53-42</image:title></image:image><image:image><image:loc>https://astrophytheory.com/wp-content/uploads/2018/05/image0006-19-55-07.jpg</image:loc><image:title>Image0006 19-55-07</image:title></image:image><lastmod>2018-05-27T14:09:39+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://astrophytheory.com/2018/05/22/coordinates-and-transformations-of-coordinates/</loc><lastmod>2018-05-23T02:51:04+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://astrophytheory.com/2017/12/09/basics-of-tensor-calculus-and-general-relativity-overview-of-series/</loc><lastmod>2018-05-23T01:58:45+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://astrophytheory.com/research-in-magnetohydrodynamics/</loc><lastmod>2018-05-15T15:48:07+00:00</lastmod><changefreq>weekly</changefreq><priority>0.6</priority></url><url><loc>https://astrophytheory.com/2018/05/15/helicity-and-magnetic-helicity/</loc><lastmod>2018-05-15T15:24:34+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://astrophytheory.com/2017/12/17/basics-of-tensor-calculus-and-general-relativity-vectors-and-introduction-to-tensors-part-i-vectors/</loc><lastmod>2018-04-25T02:43:57+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://astrophytheory.com/2018/02/09/basic-equations-of-ideal-one-fluid-magnetohydrodynamics-part-v-the-energy-equations-and-summary/</loc><image:image><image:loc>https://astrophytheory.com/wp-content/uploads/2018/02/magfield.jpg</image:loc><image:title>magfield</image:title></image:image><lastmod>2018-02-21T03:24:36+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://astrophytheory.com/2018/02/19/proof-of-alfvens-theorem-of-flux-freezing/</loc><lastmod>2018-02-20T03:31:41+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://astrophytheory.com/2018/02/18/deriving-the-bessel-function-of-the-first-kind-for-zeroth-order/</loc><lastmod>2018-02-18T17:12:52+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://astrophytheory.com/2018/02/17/basics-of-tensor-calculus-and-general-relativity-vectors-and-introduction-to-tensors-part-ii-continuation-of-vectors/</loc><lastmod>2018-02-17T16:49:49+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://astrophytheory.com/2018/02/09/consequences-and-some-elementary-theorems-of-the-ideal-one-fluid-magnetohydrodynamic-equations/</loc><lastmod>2018-02-14T20:41:10+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://astrophytheory.com/archive/astroimages/</loc><image:image><image:loc>https://astrophytheory.com/wp-content/uploads/2017/12/processed_4.jpg</image:loc><image:title>PROCESSED_4</image:title></image:image><lastmod>2018-01-28T01:40:48+00:00</lastmod><changefreq>weekly</changefreq><priority>0.6</priority></url><url><loc>https://astrophytheory.com/2018/01/26/solution-to-the-hermite-differential-equation/</loc><lastmod>2018-01-27T18:14:06+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://astrophytheory.com/2017/12/17/monte-carlo-simulations-of-radiative-transfer-basics-of-radiative-transfer-theory-part-iia/</loc><lastmod>2018-01-23T22:54:22+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://astrophytheory.com/2018/01/07/legendre-polynomials/</loc><lastmod>2018-01-07T05:06:36+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://astrophytheory.com/2017/09/18/deriving-the-speed-of-light-from-maxwells-equations/</loc><lastmod>2017-12-31T00:48:50+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://astrophytheory.com/2017/12/07/simple-harmonic-oscillators-shos-part-i/</loc><lastmod>2017-12-30T03:00:52+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://astrophytheory.com/2017/12/07/monte-carlo-simulations-of-radiative-transfer-project-overview/</loc><lastmod>2017-12-18T02:26:59+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://astrophytheory.com/2017/09/29/solution-to-legendres-differential-equation/</loc><image:image><image:loc>https://astrophytheory.com/wp-content/uploads/2017/09/moon-1.jpg</image:loc><image:title>Moon 1</image:title></image:image><image:image><image:loc>https://astrophytheory.com/wp-content/uploads/2017/09/2x-binning-moon.jpg</image:loc><image:title>2x binning Moon</image:title></image:image><lastmod>2017-12-17T15:24:20+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://astrophytheory.com/2017/10/18/basic-equations-of-ideal-one-fluid-magnetohydrodynamics-part-iii-iv/</loc><image:image><image:loc>https://astrophytheory.com/wp-content/uploads/2017/10/dynamo.jpg</image:loc><image:title>Dynamo</image:title></image:image><lastmod>2017-12-17T05:34:54+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://astrophytheory.com/2017/12/08/monte-carlo-simulations-of-radiative-transfer-basics-of-radiative-transfer-theory-part-i/</loc><image:image><image:loc>https://astrophytheory.com/wp-content/uploads/2017/12/rt_4.jpg</image:loc><image:title>RT_4</image:title></image:image><lastmod>2017-12-17T05:26:07+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://astrophytheory.com/2017/12/11/elementary-methods-to-solving-integral-equations-overview-of-series/</loc><lastmod>2017-12-12T02:02:52+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://astrophytheory.com/about/</loc><lastmod>2017-12-11T22:04:50+00:00</lastmod><changefreq>weekly</changefreq><priority>0.6</priority></url><url><loc>https://astrophytheory.com/2017/11/26/monte-carlo-simulations-of-radiative-transfer-overview/</loc><image:image><image:loc>https://astrophytheory.com/wp-content/uploads/2017/11/rt_3.jpg</image:loc><image:title>RT_3</image:title></image:image><lastmod>2017-11-26T05:29:29+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://astrophytheory.com/2017/09/23/solution-to-the-three-dimensional-heat-equation/</loc><lastmod>2017-09-26T00:14:42+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://astrophytheory.com/2017/09/09/electron-scattering-of-a-step-potential/</loc><image:image><image:loc>https://astrophytheory.com/wp-content/uploads/2017/09/elessv.jpg</image:loc><image:title>elessv</image:title></image:image><image:image><image:loc>https://astrophytheory.com/wp-content/uploads/2017/09/potential_step.png</image:loc><image:title>potential_step</image:title></image:image><lastmod>2017-09-10T00:03:12+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://astrophytheory.com/connecting-to-the-real-world/</loc><image:image><image:loc>https://astrophytheory.com/wp-content/uploads/2017/09/2x-binning-moon-edited.jpg</image:loc><image:title>2x binning Moon edited</image:title></image:image><image:image><image:loc>https://astrophytheory.com/wp-content/uploads/2017/09/moon-3.jpg</image:loc><image:title>moon 3</image:title></image:image><lastmod>2017-09-06T00:24:23+00:00</lastmod><changefreq>weekly</changefreq><priority>0.6</priority></url><url><loc>https://astrophytheory.com/2017/09/02/basic-equations-of-ideal-one-fluid-magnetohydrodynamics-part-ii/</loc><lastmod>2017-09-02T02:54:32+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://astrophytheory.com/2017/09/01/basic-equations-of-ideal-one-fluid-magnetohydrodynamics-part-i/</loc><lastmod>2017-09-01T03:00:17+00:00</lastmod><changefreq>monthly</changefreq></url><url><loc>https://astrophytheory.com/contact/</loc><lastmod>2017-08-31T22:40:03+00:00</lastmod><changefreq>weekly</changefreq><priority>0.6</priority></url><url><loc>https://astrophytheory.com</loc><changefreq>daily</changefreq><priority>1.0</priority><lastmod>2025-12-23T02:53:36+00:00</lastmod></url></urlset>
