Is it possible to mathematically define a hypercomputer-universe where things that could not be computed by it could exist?
75085
Can hypercomputation compute the impossible?
122960
Can a wormhole be created if it has not always existed?
101877
Assumed True until proven False. The Curious Case of the Vacuous Truth
113344
How do we prove that something is unprovable?
158882
Prove the existence of some weird family of sets
70008
Virtual Particles real? Virtual particles create a universe?
74875
Do we know if there exist true mathematical statements that can not be proven?
86848
Can one ever say for certain a word does not exist?
126908
Is it possible for an encryption method to exist which is impossible to crack, even using quantum computers?
120712
Is there a way to define the "size" of an infinite set that takes into account "intuitive" differences between sets?
5022
Can a set containing $0$ be purely imaginary?
48899
Is it possible to create matter?
5964
Are there areas of mathematics (current or future) that cannot be formalized in set theory?
155340
Is Nothing actually imaginable?
128541
Something that is impossible but has happened
115996
Misleading Definitions and Unanswerable Problems in Spivak's Calculus
47736
Does anything you can think of exist?