David Grayless<p><a href="https://mastodon.social/tags/HelenaRasiowa" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>HelenaRasiowa</span></a> (20 June 1917 – 9 August 1994) was a Polish <a href="https://mastodon.social/tags/mathematician" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>mathematician</span></a>. She worked in the <a href="https://mastodon.social/tags/foundationsOfMathematics" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>foundationsOfMathematics</span></a> and <a href="https://mastodon.social/tags/algebraicLogic" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>algebraicLogic</span></a>.</p>