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Questions tagged [infinity]

Use for questions about the properties, nature, or definition of infinitude.

27 votes
9 answers
27k views

Is infinite regress of causation possible? Is infinite regress of causation necessary?

For a number of reasons — including perhaps a desire to feel that we have a complete understanding of where we came from, or at least an understanding which is completely sufficient for all of ...
Niel de Beaudrap's user avatar
13 votes
5 answers
834 views

Do all epistemologies suffer from the "regress of justifications" problem?

Aristotle describes the regress problem in his logical work Posterior Analytics I.2: b5. Some hold that, owing to the necessity of knowing the primary premisses, there is no scientific knowledge. ...
Geremia's user avatar
  • 8,260
6 votes
5 answers
2k views

How does actual infinity (of numbers or space) work?

Is infinity just continuous generation of numbers, or can space be actually infinite? If it is finite can we see it expand if we went to the edge? When I say "I am counting to infinity" does it mean ...
mathworks's user avatar
9 votes
5 answers
693 views

Is there an alternative to Cantor's cardinalities that makes proper subsets smaller than their sets?

Cantor defined an infinite set as a set whose subset can be placed in a one-to-one correspondence with its subset. That is, take the set of all natural numbers: {0, 1, 2, 3, 4,...}. From that set, you ...
phst's user avatar
  • 253
15 votes
6 answers
4k views

If we live in a simulated world, doesn't there have to be a first world that's real?

There are people who believe we live in a world, simulated on a computer. That computer must have been built in either another computer-generated world or a real world (by which I mean a non-simulated ...
Deschele Schilder's user avatar
23 votes
5 answers
4k views

What was Cantor's philosophical reason for accepting the infinite but rejecting the infinitesimal?

I have begun inquiring recently into mathematical aspects of Georg Cantor's theory of transfinite numbers and sets, which he developed between the years of 1874 and 1897. Throughout his theory, Cantor ...
L.M. Student's user avatar
  • 2,731
18 votes
11 answers
27k views

Does the impossibility of an infinite regress prove God exists?

I'm strictly discussing one aspect of God: God as the First Cause. I am excluding all other qualities of God defined by any religion or belief system -- including the notion of God as a sentient being....
Lynel Hudson's user avatar
5 votes
4 answers
2k views

Cantor and infinities

I know we have accepted Cantor's ideas a long time ago and many mathematicians use sets and infinities without ever realizing that thinking about sets and infinities intuitively fails, because there ...
glebovg's user avatar
  • 380
1 vote
4 answers
1k views

Would it be logically possible that the Universe has a beginning in time but an infinite amount of time has elapsed since this beginning?

Imagine that the Universe had a temporal beginning but no temporal end. At the beginning the Universe has a finite size, and as time passes its size increases exponentially. And the number of ...
user50746's user avatar
  • 111
-4 votes
1 answer
247 views

Problem with infinity? [closed]

Note: See PART 2 for a better question. 1 kg of matter has infinite number of parts. Infinite number of things together can make an infinite amount of matter. 1 kg is not equal to infinite amount. We ...
Koorosh's user avatar
  • 77
24 votes
24 answers
8k views

Is infinity a number?

So I've been on a number of math fora, part of learning some calculus (not much of set theory, no). To my surprise I found what I would describe as strong resistance from some folks against (using) ...
Hudjefa's user avatar
  • 4,361
20 votes
13 answers
11k views

Why would infinite monkeys not produce the works of Shakespeare?

Apologies if this is a very basic/obvious question. I have no training in philosophy, but have been making my way through Peter Adamson's History of Philosophy podcast. Recently I listened to his ...
Uzai's user avatar
  • 303
13 votes
9 answers
2k views

Are infinities in physics (or in any other materalist philosophy) actually possible?

Aristotle made a distinction between infinities that were in potential (dunamis) and in actuality (energia); and stated that actual infinities did not obtain in the physical world. This is the basis ...
Mozibur Ullah's user avatar
8 votes
3 answers
2k views

Are infinitesimals in the Newton and Leibniz calculus potential or actual?

Was reading a bit about history of calculus and its philosophy and stumbled into source of confusion: were infinitesimals in seventeenth century calculus assumed to be actual or potential? Was there ...
L.M. Student's user avatar
  • 2,731
6 votes
8 answers
1k views

Is a distinction between actual and potential infinity philosophically significant?

I could use a little exposition on the significance of the distinction. I'm aware that potential infinities have arbitrarily large numbers, whilst actual infinities refer to the number "infinity" ...
Maths That Imo's user avatar

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