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Comp."],"abstract":"<p>\n                    Meshing of geometric domains having curved boundaries by affine simplices produces a polytopial approximation of those domains. The resulting error in the representation of the domain limits the accuracy of finite element methods based on such meshes. On the other hand, the simplicity of affine meshes makes them a desirable modeling tool in many applications. In this paper, we develop and analyze higher-order accurate finite element methods that remain stable and optimally accurate on polytopial approximations of domains with smooth boundaries. This is achieved by constraining a judiciously chosen extension of the finite element solution on the polytopial domain to weakly match the prescribed boundary condition on the true geometric boundary. We provide numerical examples that highlight key properties of the new method and that illustrate the optimal\n                    <inline-formula content-type=\"math\/mathml\">\n                      <mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" alttext=\"upper H Superscript 1\">\n                        <mml:semantics>\n                          <mml:msup>\n                            <mml:mi>H<\/mml:mi>\n                            <mml:mn>1<\/mml:mn>\n                          <\/mml:msup>\n                          <mml:annotation encoding=\"application\/x-tex\">H^1<\/mml:annotation>\n                        <\/mml:semantics>\n                      <\/mml:math>\n                    <\/inline-formula>\n                    - and\n                    <inline-formula content-type=\"math\/mathml\">\n                      <mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" alttext=\"upper L squared\">\n                        <mml:semantics>\n                          <mml:msup>\n                            <mml:mi>L<\/mml:mi>\n                            <mml:mn>2<\/mml:mn>\n                          <\/mml:msup>\n                          <mml:annotation encoding=\"application\/x-tex\">L^2<\/mml:annotation>\n                        <\/mml:semantics>\n                      <\/mml:math>\n                    <\/inline-formula>\n                    -norm convergence rates.\n                  <\/p>","DOI":"10.1090\/mcom\/3415","type":"journal-article","created":{"date-parts":[[2019,1,30]],"date-time":"2019-01-30T09:52:27Z","timestamp":1548841947000},"page":"2187-2219","source":"Crossref","is-referenced-by-count":17,"title":["Optimally accurate higher-order finite element methods for polytopial approximations of domains with smooth boundaries"],"prefix":"10.1090","volume":"88","author":[{"given":"James","family":"Cheung","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mauro","family":"Perego","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Pavel","family":"Bochev","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Max","family":"Gunzburger","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"14","published-online":{"date-parts":[[2019,2,21]]},"reference":[{"key":"1","series-title":"Pure and Applied Mathematics (Amsterdam)","isbn-type":"print","volume-title":"Sobolev spaces","volume":"140","author":"Adams, Robert A.","year":"2003","ISBN":"https:\/\/id.crossref.org\/isbn\/0120441438","edition":"2"},{"issue":"4","key":"2","doi-asserted-by":"publisher","first-page":"343","DOI":"10.1007\/BF01389536","article-title":"Finite element approximation of the Dirichlet problem using the boundary penalty method","volume":"49","author":"Barrett, John W.","year":"1986","journal-title":"Numer. 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Vacca, The virtual element method with curved edges, arXiv preprint (2018).","DOI":"10.1051\/m2an\/2018052"},{"key":"4","series-title":"Applied Mathematical Sciences","isbn-type":"print","doi-asserted-by":"publisher","DOI":"10.1007\/b13382","volume-title":"Least-squares finite element methods","volume":"166","author":"Bochev, Pavel B.","year":"2009","ISBN":"https:\/\/id.crossref.org\/isbn\/9780387308883"},{"key":"5","series-title":"Texts in Applied Mathematics","isbn-type":"print","doi-asserted-by":"publisher","DOI":"10.1007\/978-0-387-75934-0","volume-title":"The mathematical theory of finite element methods","volume":"15","author":"Brenner, Susanne C.","year":"2008","ISBN":"https:\/\/id.crossref.org\/isbn\/9780387759333","edition":"3"},{"issue":"310","key":"6","doi-asserted-by":"publisher","first-page":"633","DOI":"10.1090\/mcom\/3240","article-title":"A cut finite element method with boundary value correction","volume":"87","author":"Burman, Erik","year":"2018","journal-title":"Math. 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