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The math controversy that, they say, led to a mental breakdown

Cantor_4In an essay called “The Root of Infinity: It’s Surreal!“, the ThatsMath blog writes about a dark side to the power of numbers. The Cantor mentioned here is George Cantor [pictured here], who pretty much created large subsets of certain branches of mathematics :

… But the extended system was hugely controversial, and for good reasons. For example, Cantor found that . His system was not commutative under addition. In fact, . We might be tempted to subtract  from each side, but this would yield the nonsensical result . The controversy was a factor in Cantor’s mental breakdown and ultimate suicide.

(Thanks to investigators @replicakill and @mathematicus for a corrective tweak to this.)

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