1.0Department of Mathematics Bloghttps://www.sites.se.manchester.ac.uk/maths-blogrich600338<blockquote class="wp-embedded-content" data-secret="Bgk9zyDQcQ"><a href="https://www.sites.se.manchester.ac.uk/maths-blog/2020/03/16/hanna-neumann/">Hanna Neumann</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://www.sites.se.manchester.ac.uk/maths-blog/2020/03/16/hanna-neumann/embed/#?secret=Bgk9zyDQcQ" width="600" height="338" title="“Hanna Neumann” — Department of Mathematics Blog" data-secret="Bgk9zyDQcQ" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script type="text/javascript"> /* <![CDATA[ */ /*! This file is auto-generated */ !function(d,l){"use strict";l.querySelector&&d.addEventListener&&"undefined"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!/[^a-zA-Z0-9]/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret="'+t.secret+'"]'),o=l.querySelectorAll('blockquote[data-secret="'+t.secret+'"]'),c=new RegExp("^https?:$","i"),i=0;i<o.length;i++)o[i].style.display="none";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute("style"),"height"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):"link"===t.message&&(r=new URL(s.getAttribute("src")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener("message",d.wp.receiveEmbedMessage,!1),l.addEventListener("DOMContentLoaded",function(){for(var e,t,s=l.querySelectorAll("iframe.wp-embedded-content"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute("data-secret"))||(t=Math.random().toString(36).substring(2,12),e.src+="#?secret="+t,e.setAttribute("data-secret",t)),e.contentWindow.postMessage({message:"ready",secret:t},"*")},!1)))}(window,document); //# sourceURL=https://www.sites.se.manchester.ac.uk/maths-blog/wp-includes/js/wp-embed.min.js /* ]]> */ </script> https://www.sites.se.manchester.ac.uk/maths-blog/wp-content/uploads/sites/13/2020/03/DSCH7621-1-scaled-e1584359708810.jpg25601311In this historical feature we explore Hanna Neumann (1914-1971) and her influential work. Hanna Neumman (born von Caemmerer, 1914) was a prominent group theorist, most well known for her work on varieties of groups. She was an eminent mathematician, and at the same time the mother of five children (almost all of whom went on […]