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Math Forum / Mathematics / Mathematical Logic / April 2005



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ThreadLast Post  Replies
Nomenology: The study of names & personality29 Apr 2005 16:41 GMT1
Hi, my name is Jeremy. I am a Nomenologist, which is a person who
studies names & its influences on personality. I have been studying
this theory for over 10 years and ive as of late just started giving
readings with the method ive created. By taking the first name OR the
Numerology is science, Cardinality is a myth29 Apr 2005 13:26 GMT32
and The Truman Show is True.
and Bill Gates is the worlds most recognised BILLionaire,
Lady Di died,
HawKING is the smartest,
approaching a proof29 Apr 2005 10:05 GMT22
I'm not particularly sophisticated in mathematical logic, so this
question may seem absurd, but suppose we have a theorem which we know
is unprovable in some system. Is it possible that there is an infinite
sequence of 'proofs' in that system that APPROACH a proof of the
Nature and Natural Numbers29 Apr 2005 06:20 GMT1
What are unnatural numbers?
Constructivists' stance on cardinality29 Apr 2005 06:06 GMT34
The apparent absense of a countable set of some data type
does not imply the existence of a larger set.  It may be
the structure of the data type that it is 'unlistable', not
its cardinality.  The virtual quantitative notion of a larger
Relation between sets and their elements28 Apr 2005 19:45 GMT33
What is the relation between sets and their elements (provided, of
course, they have any)?
Is it the relation of identity or of parthood, or in some sense both of
identity and of parthood?
What Logic Really Is28 Apr 2005 19:03 GMT17
Logic was really just an attempt to define a base of computing.  They
are really saying that given:
A. A r.e. finite set of axioms P i.e. P(axiom).
B. A recursive map Q to a finite r.e. set of theorems from any axiom or
Physical models of set theory28 Apr 2005 17:41 GMT15
I wonder whether the study of infinite sets is somehow different to all
other mathematics, in that there can be no physical system that it can
model.
The motion of planets is modelled by calculus, sub-atomic particles is
Some Simple Questions28 Apr 2005 17:34 GMT131
1. If someone says "I have a system that produces X" and in their
paper that introduces and explains the system there are no examples of
an X that is produced, does that demonstrate that the system cannot
produce X and the statement that it produces X is false?
Ancient Greeks of Euclid never used reductio ad absurdum; Infinitude of  Primes is a direct proof28 Apr 2005 03:35 GMT11
The below is an old 1990s post of mine archived in File 106 of my
website
www.iw.net/~a_plutonium
This exposition is not only a correction of one of mathematic's most
What is wrong with this argument?27 Apr 2005 22:32 GMT239
What is wrong with saying that God works in Mysterious ways?
proof by contradiction in Euclid's elements27 Apr 2005 21:41 GMT2
You don't have to go very far to find examples of proof by reductio
ad absurdum in Euclid. Only up to book I, Prop. 6, as a matter of
fact, which is presented below (as extracted from where we all
extract our Euclid).
TRUE / FALSE / EITHER "I underestimate you"27 Apr 2005 08:58 GMT3
e.g.
A You underestimate the powers of the force.
B Yes I do.
Can B be telling the truth?  Why / why  not?
representation and replacement27 Apr 2005 01:53 GMT2
Okay, suppose you have two objects, where one object A represents the other
object B, and you can always obtain one object from the other.
I would like to write A = B (to do replacements), but technically, they are
not of the same type, so it doesn't seem like you can really say ...
Euclid's actual proof - have at it!26 Apr 2005 14:59 GMT15
I'm not sure if the actual proof is either 'direct' - i.e. by
construction (correct meaning of 'direct'?) or 'indirect' - i.e. by
contradiction (correct meaning of 'indirect'?). What do YOU think?
>Proposition 20
Pages: 1 2 3 4 March, 2005
 
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