Talk:Entropy: Difference between revisions
→Several formulae on task page now invisible to many browsers
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:: [[User:CRGreathouse|CRGreathouse]] ([[User talk:CRGreathouse|talk]]) 00:55, 18 April 2013 (UTC)
: Yes, it was supposed to be bits/character and I've corrected it. Shannon called N the number of "symbols" and I call the number of different
:Physics is our best known (most efficient) set of non-lossy compression functions for the data observed in the world, which is a way of saying Occam's razor was applied. Other sets of compression functions like religion + democracy + free markets are more intelligent than physics's functions if they result in more profit for the computing device implementing the functions (algorithms), in keeping with Marcus Hutter's definition of intelligence. Deciding the most efficient way to move the symbols around with electrons in CPUs, ions in brains, votes in government, reputation in open source, or money in markets allows the computing device (CPUs implementing real A.I., brains, government, open source, markets) to most efficiently move the much larger real-world objects that the symbols represent so that the computing device can more efficiently make copies of itself (seek lower entropy). This is how entropy relates to information and how information relates to intelligence and evolution which are the result of least action dynamics seeking lower physical entropy in the distribution of N atoms on Earth, as the excess entropy is sloughed off to space with 17 low-energy un-directed photons per incoming sun-directed photon, so that the Universe can expand (entropy and energy per comoving volume of the universe is constant). The result is higher energy bonds (lower entropy due to smaller volume) of the N atoms on Earth of n types, which is why machines that utilize metal and metalloid (e.g. silicon) atoms with their previously attached oxygen atoms removed (resulting in carbon-carbon, metal-metal, silicon-silicon) are replacing biology: they are more efficient due to the higher energy low entropy bonds. This is why entropy is important. [[User:Zawy|Zawy]] ([[User talk:Zawy|talk]]) 10:33, 23 January 2016 (UTC)
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*Gotcha: a data generator may have the option of using say 256 symbols but only use 200 of those symbols for a set of data. So it becomes a matter of semantics if you chose n=256 or n=200, and neither may work (giving the same entropy when expressed in a different symbol set) because an implicit compression has been applied.
== possible typo in an equation ==
About in the middle of the task's preamble, there is a formula:
The total entropy in bits of the example above is S= 10*18.4644 = 18.4644 bits.
Should the last number be '''184.644''' (instead)? -- [[User:Gerard Schildberger|Gerard Schildberger]] ([[User talk:Gerard Schildberger|talk]]) 03:29, 16 August 2016 (UTC)
==Several formulae on task page now invisible to many browsers==
Various formulae on this page became invisible to many browsers (all those - the majority - which display the graphic file rather than processing the MathML directly), as a result of the 'tidying and spacing' edits at 19:40 Jul 14 2016. One of the issues is the editor's introduction of redundant white space around Latex expressions inside <math> tags. This white space is not currently supported by the MediaWiki processor. [[User:Hout|Hout]] ([[User talk:Hout|talk]]) 12:52, 19 September 2016 (UTC)
: Visibility of formulae to Chrome, IE/Edge, Safari etc restored by reverting task description to state before under-tested cosmetic edits of 19:40, 14 July 2016. The editor may wish to restore some of these cosmetic edits, testing their real effects in Google, Microsoft and Apple's browsers, but the the most practical immediate solution is simply to return to the state before visibility of formulae was lost. [[User:Hout|Hout]] ([[User talk:Hout|talk]]) 23:09, 16 October 2016 (UTC)
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