Talk:2586: Greek Letters - Revision history

172.70.100.12: Added a comment on capital xi.

2022-10-26T22:12:19Z

Added a comment on capital xi.

141.101.98.221: /* Ordinal analysis */

2022-05-27T18:22:02Z

‎Ordinal analysis

Vandalbane: /* Ordinal analysis */

2022-05-27T15:32:21Z

‎Ordinal analysis

141.101.98.11: /* Ordinal analysis */

2022-05-27T08:00:13Z

‎Ordinal analysis

Vandalbane at 01:23, 27 May 2022

2022-05-27T01:23:29Z

Laurus at 00:54, 27 May 2022

2022-05-27T00:54:12Z

172.70.82.3: /* the natural numbers under '<' */ new section

2022-05-24T04:02:23Z

‎the natural numbers under '<': new section

172.70.86.44: Complained about similar sounding characters...

2022-03-16T18:21:44Z

Complained about similar sounding characters...

172.70.246.55 at 11:08, 8 March 2022

2022-03-08T11:08:00Z

Bwisey at 13:11, 5 March 2022

2022-03-05T13:11:06Z

← Older revision		Revision as of 22:12, 26 October 2022
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	I've found a use for capital Xi: https://en.wikipedia.org/wiki/Harish-Chandra%27s_%CE%9E_function that seems to be from the field of Harmonic Analysis. [[User:Douira\|Douira]] ([[User talk:Douira\|talk]]) 14:50, 26 February 2022 (UTC)		I've found a use for capital Xi: https://en.wikipedia.org/wiki/Harish-Chandra%27s_%CE%9E_function that seems to be from the field of Harmonic Analysis. [[User:Douira\|Douira]] ([[User talk:Douira\|talk]]) 14:50, 26 February 2022 (UTC)

		+	Uppercase xi is used by Alan Turing in his essay Systems of Logic Based on Ordinals to represent ordinals. I consider this to be a possible example of an alien mathematician among us. 17:11 26 October 2022

	The part that says the farad is "unusually large" is incredibly biased IMO. On the scale of planets its "unusually small", In fact, on the scale of EV's its even pretty normal. The writer is only considering small electronic circuits. Also the Henry is very well scaled to the Farad so how "unusual" is it really? [[Special:Contributions/108.162.241.33\|108.162.241.33]] 17:13, 26 February 2022 (UTC)		The part that says the farad is "unusually large" is incredibly biased IMO. On the scale of planets its "unusually small", In fact, on the scale of EV's its even pretty normal. The writer is only considering small electronic circuits. Also the Henry is very well scaled to the Farad so how "unusual" is it really? [[Special:Contributions/108.162.241.33\|108.162.241.33]] 17:13, 26 February 2022 (UTC)

← Older revision		Revision as of 18:22, 27 May 2022
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	::I can't believe that the article is being edited again, over this, for the Nth time! [[Special:Contributions/141.101.98.11\|141.101.98.11]] 08:00, 27 May 2022 (UTC)		::I can't believe that the article is being edited again, over this, for the Nth time! [[Special:Contributions/141.101.98.11\|141.101.98.11]] 08:00, 27 May 2022 (UTC)
	:::Was there some kind of debate over it? [[User:Vandalbane\|Vandalbane]] ([[User talk:Vandalbane\|talk]]) 15:32, 27 May 2022 (UTC)		:::Was there some kind of debate over it? [[User:Vandalbane\|Vandalbane]] ([[User talk:Vandalbane\|talk]]) 15:32, 27 May 2022 (UTC)
		+	::::Not that I'm aware of, that was just a [https://wiki.lspace.org/Pune pune] on the term {{w\|Ordinal numeral\|'ordinal'}}. Here's the missing smiley that makes it more obvious. -> ;) [[Special:Contributions/141.101.98.221\|141.101.98.221]] 18:22, 27 May 2022 (UTC) ( :p <-- And here's the other one that this comment might need.)

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 Why keep all the unnecessary ordinal-related stuff (beyond omega)? Ordinal analysis is an _extremely_ niche field - most professional mathematicians never even heard of it - so it is quite safe to assume Randall did not have it in mind. I don't think it helps explaining the comic any more than saying rho is the usual symbol for the Gaussian mass of a Euclidean lattice (i.e. not at all). {{unsigned|Laurus}}
 :Taking a close look at the comic, I think you're right. It pains me a bit, but I think you're right, the ordinals ought to go. [[User:Vandalbane|Vandalbane]] ([[User talk:Vandalbane|talk]]) 01:23, 27 May 2022 (UTC)
-:I can't believe that the article is being edited again, over this, for the Nth time! [[Special:Contributions/141.101.98.11|141.101.98.11]] 08:00, 27 May 2022 (UTC)
+::I can't believe that the article is being edited again, over this, for the Nth time! [[Special:Contributions/141.101.98.11|141.101.98.11]] 08:00, 27 May 2022 (UTC)

← Older revision		Revision as of 08:00, 27 May 2022
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	Why keep all the unnecessary ordinal-related stuff (beyond omega)? Ordinal analysis is an _extremely_ niche field - most professional mathematicians never even heard of it - so it is quite safe to assume Randall did not have it in mind. I don't think it helps explaining the comic any more than saying rho is the usual symbol for the Gaussian mass of a Euclidean lattice (i.e. not at all). {{unsigned\|Laurus}}		Why keep all the unnecessary ordinal-related stuff (beyond omega)? Ordinal analysis is an _extremely_ niche field - most professional mathematicians never even heard of it - so it is quite safe to assume Randall did not have it in mind. I don't think it helps explaining the comic any more than saying rho is the usual symbol for the Gaussian mass of a Euclidean lattice (i.e. not at all). {{unsigned\|Laurus}}
	:Taking a close look at the comic, I think you're right. It pains me a bit, but I think you're right, the ordinals ought to go. [[User:Vandalbane\|Vandalbane]] ([[User talk:Vandalbane\|talk]]) 01:23, 27 May 2022 (UTC)		:Taking a close look at the comic, I think you're right. It pains me a bit, but I think you're right, the ordinals ought to go. [[User:Vandalbane\|Vandalbane]] ([[User talk:Vandalbane\|talk]]) 01:23, 27 May 2022 (UTC)
		+	:I can't believe that the article is being edited again, over this, for the Nth time! [[Special:Contributions/141.101.98.11\|141.101.98.11]] 08:00, 27 May 2022 (UTC)

← Older revision		Revision as of 01:23, 27 May 2022
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	What does this mean?		What does this mean?

−	Why keep all the unnecessary ordinal-related stuff (beyond omega)? Ordinal analysis is an _extremely_ niche field - most professional mathematicians never even heard of it - so it is quite safe to assume Randall did not have it in mind. I don't think it helps explaining the comic any more than saying rho is the usual symbol for the Gaussian mass of a Euclidean lattice (i.e. not at all).	+	== Ordinal analysis ==
		+	Why keep all the unnecessary ordinal-related stuff (beyond omega)? Ordinal analysis is an _extremely_ niche field - most professional mathematicians never even heard of it - so it is quite safe to assume Randall did not have it in mind. I don't think it helps explaining the comic any more than saying rho is the usual symbol for the Gaussian mass of a Euclidean lattice (i.e. not at all). {{unsigned\|Laurus}}
		+	:Taking a close look at the comic, I think you're right. It pains me a bit, but I think you're right, the ordinals ought to go. [[User:Vandalbane\|Vandalbane]] ([[User talk:Vandalbane\|talk]]) 01:23, 27 May 2022 (UTC)

← Older revision		Revision as of 00:54, 27 May 2022
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	What does this mean?		What does this mean?
		+
		+	Why keep all the unnecessary ordinal-related stuff (beyond omega)? Ordinal analysis is an _extremely_ niche field - most professional mathematicians never even heard of it - so it is quite safe to assume Randall did not have it in mind. I don't think it helps explaining the comic any more than saying rho is the usual symbol for the Gaussian mass of a Euclidean lattice (i.e. not at all).

← Older revision		Revision as of 04:02, 24 May 2022
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	My favourite use of Greek letters in maths is that (in my experience) ψ is used as a backup for φ (so when you have already used phi, you use psi as the second one), and χ is sometimes used as a reserve for that. This means you can have an equation involving all three. This is perfectly clear on paper, but any discussion surrounding it is a nightmare, as they all sound exactly the same... Also this is generally φ rather than ϕ. The former is generally used for functions (specifically homomorphisms in groups) and the latter for spherical polars. Although they both have other uses, and that is a pretty vague rule... [[Special:Contributions/172.70.86.44\|172.70.86.44]] 18:21, 16 March 2022 (UTC)		My favourite use of Greek letters in maths is that (in my experience) ψ is used as a backup for φ (so when you have already used phi, you use psi as the second one), and χ is sometimes used as a reserve for that. This means you can have an equation involving all three. This is perfectly clear on paper, but any discussion surrounding it is a nightmare, as they all sound exactly the same... Also this is generally φ rather than ϕ. The former is generally used for functions (specifically homomorphisms in groups) and the latter for spherical polars. Although they both have other uses, and that is a pretty vague rule... [[Special:Contributions/172.70.86.44\|172.70.86.44]] 18:21, 16 March 2022 (UTC)
		+
		+	== the natural numbers under '<' ==
		+
		+	What does this mean?

← Older revision		Revision as of 18:21, 16 March 2022
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	One thing missed so far, the lowercase epsilon is also used in automata theory. There usually words (strings of symbols from an alphabet), which do contain lowercase epsilons, are equivalent to the same word, after removing any occurence of lowercase epsilon from the string. Ie. the lowercase epsilon there denotes the "empty symbol" (or "empty letter"). For further reading ie. look up non determitistic finite automata with (and without) epsilon transitions. Also in other branches of theoretical computer science the lowercase epsilon is usually used as "empty symbol" or "empty letter".		One thing missed so far, the lowercase epsilon is also used in automata theory. There usually words (strings of symbols from an alphabet), which do contain lowercase epsilons, are equivalent to the same word, after removing any occurence of lowercase epsilon from the string. Ie. the lowercase epsilon there denotes the "empty symbol" (or "empty letter"). For further reading ie. look up non determitistic finite automata with (and without) epsilon transitions. Also in other branches of theoretical computer science the lowercase epsilon is usually used as "empty symbol" or "empty letter".
		+
		+	My favourite use of Greek letters in maths is that (in my experience) ψ is used as a backup for φ (so when you have already used phi, you use psi as the second one), and χ is sometimes used as a reserve for that. This means you can have an equation involving all three. This is perfectly clear on paper, but any discussion surrounding it is a nightmare, as they all sound exactly the same... Also this is generally φ rather than ϕ. The former is generally used for functions (specifically homomorphisms in groups) and the latter for spherical polars. Although they both have other uses, and that is a pretty vague rule... [[Special:Contributions/172.70.86.44\|172.70.86.44]] 18:21, 16 March 2022 (UTC)

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 The lowercase epsilon is used much more often for something else - usually to denote that the "variable" on the lefthanded side is a member of the "set" of the righthanded side of the lowercase epsilon. Of course, this is totally unimportant ;-).
 :You are referring to the "element of" sign, which is distinct from lowercase epsilon (although based on it).
 I highly doubt that the use of Ξ has anything to do with it "looking like a UFO." Rather, I'd suggest it's because it's essentially never used, at least among the English speaking mathematicians in the US, and probably Europe. [[User:Douira|Douira]] went out of their way to find an example, and found something increadibly obscure, which supports the point. ''Why'' Ξ is rarely used is another question. Maybe because it could easily be confused for an E or Sigma, with lazy handwritting? Maybe because it's a Greek letter without a direct Latin counterpart, so doesn't correspond with the first letter of any common words? [[Special:Contributions/162.158.63.49|162.158.63.49]] 22:50, 26 February 2022 (UTC)som
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 It just occurred to me Poseidon could be written as Poψdon. Then his trident is in his name. [[User:Bwisey|Bwisey]] ([[User talk:Bwisey|talk]]) 13:11, 5 March 2022 (UTC)

← Older revision		Revision as of 13:11, 5 March 2022
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	Why is Randall so good at making me crack up? Am I really that much of a nerd? (Okay granted I needed an explanation for some of this, hence my presence here, but still, Addition® and Multiplication® Pro® got me so...)--[[User:Twisted Code\|Twisted Code]] ([[User talk:Twisted Code\|talk]]) 17:10, 4 March 2022 (UTC)		Why is Randall so good at making me crack up? Am I really that much of a nerd? (Okay granted I needed an explanation for some of this, hence my presence here, but still, Addition® and Multiplication® Pro® got me so...)--[[User:Twisted Code\|Twisted Code]] ([[User talk:Twisted Code\|talk]]) 17:10, 4 March 2022 (UTC)
		+
		+	It just occurred to me Poseidon could be written as Poψdon. Then his trident is in his name. [[User:Bwisey\|Bwisey]] ([[User talk:Bwisey\|talk]]) 13:11, 5 March 2022 (UTC)