IEEE 754

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Selected answers by <Ciro Santilli> on the subject:
* https://stackoverflow.com/questions/18118408/what-is-difference-between-quiet-nan-and-signaling-nan/55648118#55648118[What is difference between quiet NaN and signaling NaN?]
* https://stackoverflow.com/questions/2618059/in-java-what-does-nan-mean/55673220#55673220[In Java, what does NaN mean?]
* https://stackoverflow.com/questions/8341395/what-is-a-subnormal-floating-point-number/53203428#53203428[What is a subnormal floating point number?]
