Ittay Weiss

19,169 reputation

12868

bio	website	sites.google.com/site/…
	location	Fiji
	age	36
visits	member for	1 year
	seen	1 hour ago
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I'm a lecturer of mathematics at the University of the South Pacific. My research interests are in algebraic topology and metric geometry.

	19,169 reputation	bio	website	sites.google.com/site/…	visits	member for	1 year
12868 badges		location	Fiji		seen	1 hour ago

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2h	reviewed	Close How to write $\pi$ as a set in ZF?
2h	reviewed	Close $‎C_{c}(X)$ is a subspace of ‎$‎C_{0}(X)$ ‎but ‎it ‎is ‎not ‎Banach
2h	comment	Compact subsets of function spaces, geometry @Norbert the article I cite does a very good job giving more details.
3h	answered	Compact subsets of function spaces, geometry
5h	comment	Binary operations of addition and multiplication. do you know the definitions of semigroup and group? if so, just check that the axioms are verified. It is straightforward. If you get stuck, explain where.
5h	reviewed	Close Which topics of mathematics should I study?
5h	reviewed	Close Maths vicky kumar mahto
5h	reviewed	Close Solve for an Ellipse Tangent to 2 Lines
5h	reviewed	Approve suggested edit on Let $A$ be real symmetric $n\times n$ matrix whose only eigenvalues are 0 and 1. Pick out the true statements.
15h	comment	Metric assuming the value infinity Not all definition are optimal at birth. The concept of metric space is rather young (about 100 years old) and we can't ask Frechet anymore. It should be noted that Frechet's work at the time was extremely abstract and was a huge leap forward. Perhaps it was already such a psychological hurdle to consider abstract sets as domains of spaces that the possibility of having infinite distance was not entertained.
1d	reviewed	Close *$\hom(U, V)=U^\otimes V$**
1d	reviewed	Approve suggested edit on Show that $\alpha_1u+\alpha_2v+\alpha_3w=0\Rightarrow\alpha_1=\alpha_2=\alpha_3=0$
1d	answered	Is it true that a monotic, differentiable function with non-zero derivative has a continuous inverse?
1d	comment	Is it true that a monotic, differentiable function with non-zero derivative has a continuous inverse? by monotonic, do you mean $x<y\implies f(x)<f(y)$?
1d	comment	What does area represent? not only points have measure $0$ and the amount of space a 2-dimensional object takes up is $0$.
1d	awarded	Nice Answer
1d	answered	What does area represent?
1d	answered	Why is it important that a basis be orthonormal?
1d	answered	Metric assuming the value infinity
1d	reviewed	Approve suggested edit on How to solve these elementary algebra questions?