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Science & Technology
The Banach–Tarski Paradox!
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<blockquote data-quote="CDS" data-source="post: 107840" data-attributes="member: 6381"><p><strong>Published on Jul 31, 2015</strong></p><p>The Banach-Tarski Paradox is well-known among mathematicians, particularly among set theorists.</p><p></p><p>The paradox states that it is possible to take a solid sphere (a "ball"), cut it up into a <em>finite</em> number of pieces, rearrange them using only rotations and translations, and re-assemble them into <em>two</em> identical copies of the original sphere. In other words, you've doubled the volume of the original sphere.</p><p></p><p>"Impossible!" I hear you say. "That violates physical laws!" Well, that is what many mathematicians said when they first heard this paradox. But I'd like to point out this may not be as impossible as one might think at first. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite42" alt=":confused:" title="Confused :confused:" loading="lazy" data-shortname=":confused:" /></p><p></p><p></p><p style="text-align: center">[MEDIA=youtube]s86-Z-CbaHA[/MEDIA]</p> <p style="text-align: center"></p><p></p><p></p><p><strong>Q: "What's an anagram of Banach-Tarski?"</strong></p><p><strong>A: "Banach-Tarski Banach-Tarski."</strong></p><p></p><p></p><p><img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite48" alt=":rolleyes:" title="Roll eyes :rolleyes:" loading="lazy" data-shortname=":rolleyes:" /></p></blockquote><p></p>
[QUOTE="CDS, post: 107840, member: 6381"] [B]Published on Jul 31, 2015[/B] The Banach-Tarski Paradox is well-known among mathematicians, particularly among set theorists. The paradox states that it is possible to take a solid sphere (a "ball"), cut it up into a [I]finite[/I] number of pieces, rearrange them using only rotations and translations, and re-assemble them into [I]two[/I] identical copies of the original sphere. In other words, you've doubled the volume of the original sphere. "Impossible!" I hear you say. "That violates physical laws!" Well, that is what many mathematicians said when they first heard this paradox. But I'd like to point out this may not be as impossible as one might think at first. :confused: [CENTER][MEDIA=youtube]s86-Z-CbaHA[/MEDIA] [/CENTER] [B]Q: "What's an anagram of Banach-Tarski?" A: "Banach-Tarski Banach-Tarski."[/B] :rolleyes: [/QUOTE]
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The Banach–Tarski Paradox!
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