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Author Topic: Theory and Maths  (Read 3872 times)
thompson1780
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« Reply #90 on: 23:54:27, 10-05-2007 »

I think the idea behind the Frege/Russell set-theoretical definition of number is that it's the most fundamental one they could think of - remember that Russell was trying to put the whole of mathematics on an unassailably logical basis. It needs only to define the concept of an empty set and of a successor function, and therefore treats a concept like "two" as not being a fundamental axiom.

The Mathematician / Physicist in me finds this reduction to the simplest 'atoms'/particles attractive.  Basic learning may start with 1, 2, 3, 4, etc, but why define all numbers up to 10 (or 100) as axioms?  It's just inefficient, and illogical (where do you draw the line).

Frege/Russell got it down to an empty set and a successor function and thus derived 1.  Could you start with 0 and 1 as axioms and derive the successor function?  That would seem more natural - but I do grant you that 'natural' in this sense is probably dictated by how we learn numbers (i.e. 1, then 2, then 3....).

Sorry, this has strayed off the music side of things again.

Tommo
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increpatio
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« Reply #91 on: 07:36:51, 11-05-2007 »

Frege/Russell got it down to an empty set and a successor function and thus derived 1. 

Actually, I think this was von Neumann.  As I recall, from my brief (and, it has to be said, terribly entertaining) perusal of the Principia some years back, they defined numbers to be equivalence classes of sets: so 0 is the empty set, 1 is identified with all sets containing 1 thing, 2 is identified with all sets containing 2 things, and so on.  (& I don't know much about Frege at all).

*googles*: the internet agrees with me:
Von Neumann Integers
Set-theoretic definition of natural numbers

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Could you start with 0 and 1 as axioms and derive the successor function?  That would seem more natural - but I do grant you that 'natural' in this sense is probably dictated by how we learn numbers (i.e. 1, then 2, then 3....).

Yeah; but it's a little harder to pin down; Rings (of which the system of natural numbers, integers, real numbers, rational numbers &c. are examples) are the most basic mathematical objects I can think of off-hand of that commonly make use of the notion of 0 and 1 in their explicit definition:

Wikipedia:Ring

So how many of us are there here?

That'd be five-and-a-half, by my count.  Thankfully I can keep the "half" in my head as a mental note, but if any more pop up I might have to abandon my practicing of pieces for left hand only and devote my time entirely to enumeration... .
« Last Edit: 07:55:27, 11-05-2007 by increpatio » Logged

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Sydney Grew
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« Reply #92 on: 10:24:59, 11-05-2007 »

. . . remember that Russell was trying to put the whole of mathematics on an unassailably logical basis.

No we cannot find a good word for Russell. He was not a deep thinker. What little respect we may once have had for him evaporated immediately and absolutely upon inspection of his dreadful History of Western Philosophy wherein he dismisses Schelling in three sneering lines ("Schelling was more amiable [than Fichte] but not less subjective. He was closely associated with the German romantics; philosophically, though famous in his day, he is not important") while devoting a chapter each to the less worthy Kant and Hegel. If Russell could be so wrong and silly about Schelling, it is impossible to trust his judgement on any matter philosophical logical or mathematical.

Whitehead though was an astute and level-headed man; we were suckled on his Process and Reality.
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Ian Pace
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« Reply #93 on: 10:38:33, 11-05-2007 »

No we cannot find a good word for Russell. He was not a deep thinker. What little respect we may once have had for him evaporated immediately and absolutely upon inspection of his dreadful History of Western Philosophy wherein he dismisses Schelling in three sneering lines ("Schelling was more amiable [than Fichte] but not less subjective. He was closely associated with the German romantics; philosophically, though famous in his day, he is not important") while devoting a chapter each to the less worthy Kant and Hegel. If Russell could be so wrong and silly about Schelling, it is impossible to trust his judgement on any matter philosophical logical or mathematical.

In this respect, we are in agreement with Member Grew and would suggest that, for all the issues this member would obviously have with the author's politics, that Roger Scruton's A Short History of Western Philosophy: From Descartes to Wittgenstein is a preferable alternative to the aforementioned work of Russell, despite its being considerably shorter.
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'These acts of keeping politics out of music, however, do not prevent musicology from being a political act . . .they assure that every apolitical act assumes a greater political immediacy' - Philip Bohlman, 'Musicology as a Political Act'
George Garnett
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« Reply #94 on: 10:41:29, 11-05-2007 »

No we cannot find a good word for Russell...... Whitehead though was an astute and level-headed man; we were suckled on his Process and Reality.

You may be right about M'Lord Russell's character, Master Grew. His rather clumsy attempts to foist himself as a wet-nurse upon my grandmother were, according to whispered family legend, not the actions of a true gentleman. Sadly, we do not recall the presence of Process and Reality on our own nursery menu. In the austere post-war years Cow and Gate was the best that Nursie could find us and we suspect that was on the black market.
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David_Underdown
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« Reply #95 on: 10:45:53, 23-05-2007 »

To me, there is something about language here - what do we mean by the words 'one', 'two' and 'zero'?  i don't think I start from the same axioms that Russell did.

That sets me wondering about another possibility - are there any languages that do not have a concept of 'zero'?

Well, zero was introduced to western europe from India via the arab infidels, so presumably Olde English (pre-crusades) fits the bill.....  One for Tony in his capacity as an English Scholar, I guess.

Tommo

As I recall from History of mathematics lectures, the ancient Greek mathematicians even argued about whether 1 was actually a number, since it had no effect in multiplication.  Generally, it's taken a while for absence of a qunatity to be seen as a quantity in and of itself I think.
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David
increpatio
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« Reply #96 on: 16:32:01, 23-05-2007 »

That sets me wondering about another possibility - are there any languages that do not have a concept of 'zero'?

Well, zero was introduced to western europe from India via the arab infidels, so presumably Olde English (pre-crusades) fits the bill.....  One for Tony in his capacity as an English Scholar, I guess.

Tommo

As I recall from History of mathematics lectures, the ancient Greek mathematicians even argued about whether 1 was actually a number, since it had no effect in multiplication.  Generally, it's taken a while for absence of a qunatity to be seen as a quantity in and of itself I think.

Also they had trouble with 2, from what I recall; they had issues with the fact that adding it to itself is the same as multiplying it by itself.  In addition, though the Indian dudes had a symbol for 0, it only really obtained it's full modern function as a number when the Arabs adopted it, I think.
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Tony Watson
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« Reply #97 on: 17:04:32, 23-05-2007 »

That sets me wondering about another possibility - are there any languages that do not have a concept of 'zero'?

How strange that on one thread people are trying to get to a million and here people are thinking about nothing.

Anyone interested in this concept might like to try "The Nothing That Is" by Robert Kaplan. The second chapter is called "The Greeks had no word for it" and apparently there was no word for zero in the Greek of Homer's time. Throughout the book there are considerations of the words used for 0 as well as mathematical considerations, such as what zero to the power of zero might be. There's also an interesting chapter called "Nothing" in "Mathematical Magic Show" by Martin Gardner.

Nought and naught are words that have a very good Anglo-Saxon pedigree though I don't think they were used in the same sense of zero, that is, as a means of counting or calculating. The word zero came to use from Arabic via French and is related to the word cipher.
« Last Edit: 17:06:16, 23-05-2007 by Tony Watson » Logged
increpatio
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« Reply #98 on: 17:15:15, 23-05-2007 »

There is also at least one (tribal) language that don't have numbers above three or four.

Ah yes.

http://www.mathematicalbrain.com/guard04b.html
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SusanDoris
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« Reply #99 on: 18:48:56, 23-05-2007 »

Tony Watson

Interesting to note your comments about that book about nothing; it rings a bell - I think I might have read it; or in any case something similar, as it was the story of nothing, not too mathematical!

I see that Roger Scruton was mentioned. While I could still read and see the little music quotes, I read 'The Aesthetics of Music' by him. I'd seen or heard it reviewed and borrowed it from the Library. I think they bought a copy especially because I had asked about it, so I do hope many people read it afterwards, otherwise I would have felt that was slightly unfair! It was of course a bit daunting, but I read it carefully all the way through and enjoyed it, although I did not go back and re-read some of the more difficult to understand sections. Definitelynot the sort of thing that is produced in an audio version.
« Last Edit: 18:51:16, 23-05-2007 by SusanDoris » Logged
increpatio
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« Reply #100 on: 19:57:04, 29-08-2007 »

This doesn't seem like an entirely inappropriate thread to post this thought on, given that I was going to give something of a compositional slant to it anyway; I was talking to a mathematician today, and he described to me the immense difficulty some problems that people are faced with posed, how they can cause intense stress/depression &c., but more than that, personally finding them intensely disturbing sometimes psychologically (possibly it might be reasonable to take the abstract nature of the problems as a source of this); do any of the composers on this board, or the musicians, ever find this when composing their own music, or in playing/learning the music of others?
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martle
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« Reply #101 on: 21:57:09, 29-08-2007 »

Inky, I'm not entirely sure what you're asking here, but if it's about composition and maths then I think you'll find that most composers here on the board, and perhaps most out there in the wide world, find something of use or interest in mathematical ideas/formulations etc. I do, although not usually in specific ways; and I certainly don't find them psychologically disturbing. In fact they often feel like some of the more natural and 'musical' ways to determine/influence/inform compositional decisions - or, perhaps more honestly, ways of 'thinking'. This might sound weird to some (although I'd bet not to most composers here), but feeding some compositional material through the mince-machine of a mathematical permutation or process is often a wonderfully effective way of finding out more about its nature, or essence, whether or not you choose to use the resultes in any kind of literal fashion.
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Chafing Dish
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« Reply #102 on: 22:24:21, 29-08-2007 »

For personal and emotional reasons, I cannot seem to bring myself to use the results of mathematical operations in my music, i.e., "generate" musical material from mathematical operations. For some reason, I have a block against the very word "generate". Instead, I try to set up situations that resemble improvisation, where I am confronted with musical possibilities whose structural provenance I cannot determine or cannot remember. Then I observe myself making decisions about how to shape that material, and I try to do so in an unsystematic, purely "intuitive" way, convinced that my intuition has its own structure and not caring to peek under the hood any further than that (i.e., figuring out the very mechanics of my own intuition -- great way to drive oneself crazy, that would be!*)

Though I am strong in mathematics, it took me a long time to realize that my understanding of that subject was actually getting in the way of my enjoyment of the composition process, even getting in the way of hearing (?). Math is a will-o-wisp, an attractive light that continually tempts me into the swamp of unreal order; I have to largely ignore it if I intend to make (finish!) something I can be happy with. After all, reality is messy, or the clash of conflicting realities is more 'real' than any order one imposes on it.

I'm not sure this helps the maths and music discussion, since it seems to disavow a fruitful relationship between the two. But I don't deny that they are linked, and predilections toward them do seem to correlate!

*since one is bound to fail.
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increpatio
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« Reply #103 on: 22:25:26, 29-08-2007 »

Inky, I'm not entirely sure what you're asking here, but if it's about composition and maths then I think you'll find that most composers here on the board, and perhaps most out there in the wide world, find something of use or interest in mathematical ideas/formulations etc. I do, although not usually in specific ways;

I wasn't asking as to how musicians/composers might find mathematics 'disturbing', but rather if they might find some of the music (maybe more the processes of playing/composing them) to have at times produced an analogous psychological effect.  (I understand it's rather a personal question, or at least I wasn't able to think of a more neutral phrasing when I wrote it earlier on today).

Quote
and I certainly don't find them psychologically disturbing. In fact they often feel like some of the more natural and 'musical' ways to determine/influence/inform compositional decisions - or, perhaps more honestly, ways of 'thinking'. This might sound weird to some (although I'd bet not to most composers here), but feeding some compositional material through the mince-machine of a mathematical permutation or process is often a wonderfully effective way of finding out more about its nature, or essence, whether or not you choose to use the results in any kind of literal fashion.

Maths as a tool is excellent to approach this way.  I have derived myself immense pleasure from playing about with mathematics and music.

On the more mathematical side: what sort of "mince-machines" are you talking of? The imagery that brings to my mind is rather difficult to interpret (and in any event I am interested to know!)
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martle
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« Reply #104 on: 22:35:24, 29-08-2007 »

On the more mathematical side: what sort of "mince-machines" are you talking of? The imagery that brings to my mind is rather difficult to interpret (and in any event I am interested to know!)

(CD, I completely understand all that, and don't think I'm so different to you. I try to combine improv-related methods of creating with more systematic methods, in whatever proportion and in whatever way seems appropriate to the job in hand.)

Inky, by 'mince-machines' I simply mean parsing various pitch or rhythmic material, or some notions of large-scale proportion, through some kind of ordered process, however uninstinctive it initially seems, just to see what comes out the other end. Somtimes that can yield very illuminating results; ones which I/one can take away and 'play' with more intuitively, potentially, or indeed use as they are. Seems to me that often the process of creating 'art' can be one of tricking oneself into fecundity - often against the most unlikely odds.
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