 General History General History Forum  General history questions and discussions 
January 9th, 2017, 12:54 PM

#31  Historian
Joined: Jun 2015 From: Scotland Posts: 1,034  Quote:
Originally Posted by constantine Whether you say 9+1=10, 9+1=A, IX+I=X, θ+α=ι, S(9)=10, etc. is really just a matter of convention. The truly profound realization is, to borrow from Peano's axioms, that for any natural number n there exists a number S(n) (the successor of n), which is also a natural number and is distinct from n. And that says something fundamental about the set of the natural numbers.  I was too slow  
 
January 9th, 2017, 01:37 PM

#32  Historian
Joined: Oct 2012 Posts: 8,545  Quote:
Originally Posted by WITSEND In some circles this is a bit old hat but we are always learning I suppose and my view may well be wrong or incomplete. You could look at it as pure mathematicians prove theorems and applied mathematicians construct theories. While I would suggest one is easy to reconsile with the world we see the other is no less routed in reality. It is our understanding of reality that is insufficient to place some theorems within it or recognise their significance.  The real difference between applied and theoretical mathematicians is not in the nature of their work but in the motivation for their work. Pure mathematicians find a mathematical problem they regard as interesting and try to construct a proof or discover a counterexample. Applied mathematicians take a problem from another discipline, generally science or engineering, then they try to develop mathematical tools to solve this problem and prove that these tools are mathematically valid. At the end of the day, both are proving theorems in the same manner, it's just a question of where they came up with these theorems.
As for the, shall we call it, 'friendly competition' between applied and pure mathematicians, it's not really based on the quality of the mathematics done by one side or the other. Rather, there's a sense amongst certain theoretical mathematicians that the field is corrupted by being associated, even indirectly, with more vulgar fields, like the sciences, which admit observation as a source of knowledge rather than relying on pure logic and nothing else, as mathematicians do. It's really doesn't matter what the inspiration is for theorems, provided they can be mathematically proven to be true, the friendly competition just a way to demonstrate a philosophical mistrust of the sciences, combined, of course, with professional snobbery.
With all that said, I am a Mathematical Platonist. So I do agree that mathematics is firmly rooted in reality, in fact I think it's far more rooted in reality than our universe, which is merely a shadow of one out of an infinite number of possible realities.

Last edited by constantine; January 9th, 2017 at 01:42 PM.

 
January 9th, 2017, 01:43 PM

#33  Historian
Joined: Jul 2015 From: Netherlands Posts: 2,639  Quote:
Originally Posted by constantine If you want a proof of God, try Godel's Ontological Proof:
It relies on modal logic and the relationship between contingent truth and necessary truth. I can attest that it's a valid proof, but I will not speculate on the consistency of the axioms or the the implications. Nor will I pretend that I have fully got my head around modal logic.  I never got round that area of math.
It hurts us  
 
January 9th, 2017, 03:26 PM

#34  Historian
Joined: Mar 2012 From: City of Angels Posts: 1,482 
There was a book that came out several years ago I really enjoyed It was basically like the life of Pi, about a scientist going insane trying to discover the infinite. The Mystery of the Aleph: Mathematics, the Kabbalah, and the Search for Infinity by Amir D. Aczel ? Reviews, Discussion, Bookclubs, Lists
I find interesting that so much of math is based on essential and fundamental geometric proofs. The equations in the book are a bit over my head, set theory and the concept of the infinite and such. But from what i gathered much of it is based on the simple geometric proof of a cube emerging from a single point, and that's where it sort of transcends just being math. That we can prove geometrically that 3dimensional objects such as ourselves can emerge from a single point of existence, or something to that effect.

Last edited by Bishop; January 9th, 2017 at 03:29 PM.

 
January 10th, 2017, 01:01 AM

#35  Dilettante
Joined: Sep 2013 From: Wirral Posts: 3,686  Quote:
Originally Posted by Willempie Proof of god  Well the calculator on my phone didn't come up with that.
 
 
January 10th, 2017, 01:20 AM

#36  Historian
Joined: Jul 2015 From: Netherlands Posts: 2,639  Quote:
Originally Posted by GogLais Well the calculator on my phone didn't come up with that.  Never underestimate the powers of imaginary pies...
 
 
January 10th, 2017, 04:28 PM

#37  Lecturer
Joined: Apr 2015 From: Texas Posts: 326 
There are 10 types of people in this world;
Those who understand binary mathematics and those who don't....:)
Old engineering joke.
 
 
January 10th, 2017, 04:30 PM

#38  Lecturer
Joined: Apr 2015 From: Texas Posts: 326 
Now seriously, I have always been awed by the computational power of logarithms
 
 
January 11th, 2017, 06:10 AM

#39  ShoRyuKen
Joined: Apr 2010 From: T'Republic of Yorkshire Posts: 28,552  Quote:
Originally Posted by athena It is so awesome! What we can do with imaginary numbers and pi is totally mind blowing.  Pi is not an imaginary number  it's a ratio, and pretty fundamental to engineering and architecture. https://en.wikipedia.org/wiki/Imaginary_number  
 
January 11th, 2017, 07:56 AM

#40  Scholar
Joined: Jan 2017 From: Tampa, FL Posts: 755 
New here, but I hope you don't mind me blabbing on my area of expertise, since this is a recent thread. (I came to history through math, oddly enough).
I'm also a big podcast guy. One thing you might like is this podcast from the BBC on the history of mathematics.
I personally wouldn't use equations as markings for important ideas in mathematics. In fact, if you consider an equation as something with symbols like plus, minus and equals in it (it is possible to think of them differently) then equations didn't exist until 1557!
I would rather use the names of individuals (I suppose the "great man/woman" approach) or publications like Euclid's elements as important markers of mathematics's influence on the world.
I could say infinitely more but I will pause here.
Dave K
 
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