Kosmas Balanos
... that mathematician Kosmas Balanos claimed in his work Antipelargisis that he had solved the problem of doubling the cube?
... that mathematician <b id="mwA7Y"><a href="./Kosmas_Balanos" id="mwA7c" rel="mw:WikiLink" title="Kosmas Balanos">Kosmas Balanos</a></b> claimed in his work <i id="mwA7g">Antipelargisis</i> that he had solved the problem of <a href="./Doubling_the_cube" id="mwA7k" rel="mw:WikiLink" title="Doubling the cube">doubling the cube</a>?