1<!DOCTYPE html> 2<html lang="en"> 3<head> 4 <meta charset="utf-8"> 5 <meta name="viewport" content="width=device-width, initial-scale=1.0"> 6 <meta name="description" content="Sjors Heefer is a lecturer and researcher in differential geometry, relativity theory and Finsler geometry at Eindhoven University of Technology."> 7 <title>Sjors Heefer</title> 8 <link rel="stylesheet" type="text/css" href="style.css"> 9 <link rel="stylesheet" type="text/css" href="contact.css?v=6"> 10 <link rel="stylesheet" type="text/css" href="menu-clean.css?v=3"> 11 <link rel="stylesheet" type="text/css" href="experiment-tweaks.css?v=2"> 12 <link rel="icon" href="icon.ico" type="image/vnd.microsoft.icon"> 13</head> 14<body> 15<div class="container"> 16 <header> 17 <EinsteinQuote><i>"The most beautiful thing we can experience is the mysterious.<br> It is the source of all true art and science."</i> â A. Einstein</EinsteinQuote> 18 <h1>Sjors Heefer</h1> 19 <nav class="banner-mobile-nav" aria-label="Mobile navigation"> 20 <button class="banner-menu-toggle" type="button" aria-label="Open navigation menu" aria-expanded="false" aria-controls="banner-mobile-menu" onclick="var n=this.parentElement;var o=n.classList.toggle('is-open');this.setAttribute('aria-expanded',o?'true':'false');this.setAttribute('aria-label',o?'Close navigation menu':'Open navigation menu');"><span class="banner-menu-icon" aria-hidden="true"></span></button> 21 <div class="banner-menu-list" id="banner-mobile-menu"> 22 <a class="current" href="index.html">Home</a> 23 <a href="publications.html">Publications</a> 24 <a href="teaching.html">Teaching</a> 25 <a href="pianist.html">Pianist</a> 26 <a href="Balls.html">Balls</a> 27 <a href="contact.html">Contact</a> 28 </div> 29 </nav> 30 </header> 31 <main> 32 <section class="home-intro"> 33 <div class="home-copy"> 34 <p class="eyebrow">Mathematical physics · geometry · relativity</p> 35 <h2>Lecturer and researcher in differential geometry and gravity.</h2> 36 <p class="home-lead">I am a lecturer at the Department of Mathematics and Computer Science at Eindhoven University of Technology. My research focuses on differential geometry and relativity theory, particularly (pseudo-)Finsler geometry, modified theories of gravity, and connections with quantum gravity.</p> 37 <p>I am also a management committee member of <a href="https://web.infn.it/BridgeQG/" target="_blank" rel="noopener noreferrer">COST Action CA23130</a>, <i>Bridging High and Low Energies in Search of Quantum Gravity (BridgeQG)</i>. My publications and preprints are collected on the <a href="publications.html">publications page</a>.</p> 38 <p>Outside academia, I am a pianist and band leader for <a href="https://spiritgospelpop.nl/" target="_blank" rel="noopener noreferrer">Gospel/Pop Choir Spirit</a>. More information is available on the <a href="pianist.html">pianist page</a>.</p> 39 </div> 40 <img class="home-portrait" src="Studio_Koudijs_Sjors_DEF2-web.jpg" alt="Portrait of Sjors Heefer"> 41 </section> 42 <section class="home-details"> 43 <div class="professional-panel"> 44 <h3>Professional profiles</h3> 45 <div class="profile-grid"> 46 <a class="profile-link" href="https://research.tue.nl/en/persons/sjors-heefer" target="_blank" rel="noopener noreferrer">TU/e Research</a> 47 <a class="profile-link" href="https://scholar.google.it/citations?user=ONwx2d8AAAAJ&hl=en" target="_blank" rel="noopener noreferrer">Google Scholar</a> 48 <a class="profile-link" href="https://inspirehep.net/author/profile/S.Heefer.1" target="_blank" rel="noopener noreferrer">INSPIRE-HEP</a> 49 <a class="profile-link" href="https://www.researchgate.net/profile/Sjors-Heefer" target="_blank" rel="noopener noreferrer">ResearchGate</a> 50 <a class="profile-link" href="https://www.linkedin.com/in/sjorsheefer" target="_blank" rel="noopener noreferrer">LinkedIn</a> 51 </div> 52 <div class="professional-contact-row"> 53 <a class="contact-action" href="contact.html?topic=academic">Contact me</a> 54 </div> 55 </div> 56 </section> 57 </main> 58 <footer class="site-footer"><span>© 2017â2026 Sjors Heefer</span></footer> 59</div> 60<menubar> 61 <menu id="site-menu">
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