Ittay Weiss
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 7h comment What is an axiom in layman's terms? you're very welcome @AndyK enjoy! 8h comment What is an axiom in layman's terms? as long as we agree that there is no recognishion involved. 8h comment What is an axiom in layman's terms? is the consistent spelling 'Euklid' intentional? 8h answered What is an axiom in layman's terms? 1d revised Which infinity is meant in limits? edited body 1d awarded Nice Answer 2d revised Metric assuming the value infinity deleted 1 character in body 2d awarded Good Answer Apr 24 comment What is the maximum value of $\int_{0}^{2}{h(t)}dt$? welcome to MSE. Please note this is not a good way to pose a question here. What is the purpose of you asking this question here? What have you tried? Where are you stuck? You have to be clear about these things if you want to get helpful answers. Apr 21 accepted compact-open metrizability Apr 17 comment Limit point symmetric? Assuming your interpretation of $x$ is a limit point of $y$ is that $x$ belongs to the closure of $\{y\}$, the answer is that in an arbitrary topological space $X$ the relation $x\in Cl(y)$ need not imply $y\in Cl(x)$, as is very well-known. Very minimal separation conditions do imply the implication, as is also very well-known. Apr 16 comment Is set membership relation a set? If the set of all sets exists (call it $U$), then the membership relation is the set $\{(x,y)\in U\times U\mid x\in y\}$. So if the set theory you work with allows for the constructions needed for this definition of a set, then you're done. Apr 14 comment Why isn't '&' used for logical conjunction? @Constantine just like painting is not about brushes, but a question about a new style of brush certainly is of interest and belongs to world of painting, so is mathematics not about notation, but a question about some notational style is of interest and belongs to the world of mathematics. Apr 14 comment Why isn't '&' used for logical conjunction? you may wish to correct the year for Peano. I doubt he practiced mathematics in 1988.... Apr 13 awarded Necromancer Apr 12 comment closed union of closed sets Would anything go wrong if one takes the upper Vietoris topology? or the Vietoris topology? Apr 12 comment Proof that $0^0 \neq 1$ what is your definition of $0^0$? Apr 12 comment closed union of closed sets I'm interested in a convenient formalism for upper/lower semicontinuous functions, primarily in the context of generalised inverse limits of compacta (and generalisations thereof). Apr 12 comment closed union of closed sets Yes @StuKraji do you have a good reference? Apr 11 awarded Nice Question