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Jun
16
comment Do indiscernibles imply additional non-stardard models?
Thanks Wojowu, pretty clear answer! I am forced by the site to wait a day before I can give (or award) the bounty. So, check tomorrrow.
Jun
16
comment Do indiscernibles imply additional non-stardard models?
@Wojowu if you put (copy paste) your comments into an answer an there are no other good answers I'll give you the bounty, it would be a shame to loose that reputation points into thin air.
Jun
16
comment Do indiscernibles imply additional non-stardard models?
@Wojowu I had the wrong idea that, for instance, all the models of true arithmetic (at the expense of being noncomputable indefinible, etc) were isomorphic to each other (to N), that there were not any non-standard models for it. But I am not so sure now. en.wikipedia.org/wiki/True_arithmetic
Jun
16
revised Mean of highest exponent in prime factorization of all integers ≥ 2
added tags to question
Jun
16
suggested approved edit on Mean of highest exponent in prime factorization of all integers ≥ 2
Jun
16
accepted Why “a function continuous at only one point” is not an oxymoron?
Jun
16
accepted Confusion between categoricity and indiscernability
Jun
15
comment Roots of a real cubic equation
en.wikipedia.org/wiki/Cubic_function#General_formula_for_roots
Dec
26
asked Confusion between categoricity and indiscernability
Dec
26
accepted Indiscernibility of indiscernibles in second order logic
Dec
26
asked Indiscernibility of indiscernibles in second order logic
Dec
15
awarded  Caucus
Nov
12
answered Addition in linear vector spaces
Nov
9
comment Can a hyperbolic quadrilateral have 3 obtuse angles and 3 equal sides?
Not in hyperbolic space, but you can in elliptical space: just try to deform the second quadrilateral in elliptical geometry into the one you are imagining.
Oct
31
comment Why “a function continuous at only one point” is not an oxymoron?
a "connected" line? (even if it were of infinitesimal length)
Oct
31
comment question about continuity or discontinuity of a function
@DanZimm I posted my question here: math.stackexchange.com/questions/999320/…
Oct
31
asked Why “a function continuous at only one point” is not an oxymoron?
Oct
29
comment Find the value of k which makes f a density function.
It is actually the inverse of that number. The integral must be equal to 1.
Oct
29
comment question about continuity or discontinuity of a function
@DanZimm you are correct, thanks for the enlightenment! I still have trouble making sense of it. Continuity at only-one-point sounds like an oxymoron to my mind. Could it be that the classical definition of continuity fails to capture the concept of continuity for this pathological case? Or is it just me? I think I am going to post my own question about this.
Oct
29
revised question about continuity or discontinuity of a function
added 46 characters in body