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Hamou

Khénifra ( خنيفرة ) , Morocco

http://math.stackexchange.com

Le livre de la nature est écrit dans un langage mathématique. (Galilée)

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16
Why are clopen sets a union of connected components?
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14
Factoring homogeneous polynomials in two variables.
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14
Showing Lipschitz continuity for a particular distance function
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11
If $f^N$ is contraction function, show that $f$ has precisely one fixed point.
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10
an example of a continuous bijection which is not a homeomorphism
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10
Splitting in Short exact sequence
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9
Maps to Sn homotopic
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8
Let $S$ be a subset of a group $G$ that contains the identity element $1$ and such that the left cosets $aS$ with $a$ in $G$, partition $G$.
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8
Is empty set the power set of any subset?
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7
How do we know that $\mathbb{Z} + \sqrt{2}\mathbb{Z}$ isn't closed?
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7
Larger of $\cos(\ln x)$ or $\ln(\cos x)$
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7
If $f,g$ are entire functions such that $f(g(z))=0, \forall z, $ then $g$ is constant or $f(z) =0, \forall z \ ?$
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6
Prove $f: X \rightarrow Y$ is continuous if $A_a$ is closed and $f|A_a$ is continuous for any $a$ and $\text{{$A_a$}}$ is locally finite collection
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6
Uniqueness of continuous extension from $A$ to $\overline{A}$ for maps into a Hausdorff space
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6
If $f=u+iv$ is an entire function such that $u^2\geq v^2,$ then $f$ is constant
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6
Isomorphism of factor groups
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6
$M$ is a simple module if and only if $M \cong R/I$ for some $I$ maximal ideal in $R$.
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6
Prove that $S^{n-1} \simeq \Bbb R^n - \{ 0 \}$.
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6
A question about to isomorphic of two groups
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5
For which $n$ is $\mathbb{A}^n\setminus \{0\}$ an affine variety?
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5
Matrix commutation of $\boldsymbol{M}$ and $[\boldsymbol{I} - \boldsymbol{M}]^{-1}$
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5
Given $P$ idempotent, show that $I-P$ is idempotent.
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5
Question on Sequences and limits
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5
Space of matrices that commute with a given matrix
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5
'Identity theorem' for Meromorphic functions
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5
Non-Metrizable Topological Spaces
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5
$\frac{a_{n}}{1+a_{n}}\rightarrow0$ yields $a_{n}\rightarrow0$
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5
Prove or disprove that if $f(x)=\sum_{k=0}^na_kx^k$ then $\sum_{k=0}^{n+1}(-1)^{n+1-k}\binom{n+1}kf(x+k)=0$
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5
set of closed points is dense in spectrum of $A$.
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