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RAM_3R

I am a just a math-lover guy and i have also some passion on coding , puzzle, interesting thoughts .

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  • Last seen Dec 26 '20 at 7:43

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17 Does there exist a continuous surjection from $\Bbb R^3-S^2$ to $\Bbb R^2-\{(0,0)\}$? Dec 11 '17
10 $\int_a^bf^2(x)\,dx\le \frac{2}{3}\int_a^bf(x)\,dx$ for a convex differentiable function Apr 1 '19
6 Mutually commuting matrix with $A_i^2=0$ Nov 23 '18
6 Integral inequality of length of curve Mar 2 '19
4 $g(x)$ be a continuous function with recursive sequence Mar 27 '19
4 Continuous Bijective map Nov 20 '17
4 Nonsingular matrix problem Jan 7 '18
4 Nullity and rank bounds for a nilpotent matrix Feb 9 '18
3 Polynomials with integration problem Sep 18 '17
3 Cardinality of a group vs. cardinality of the number of its subgroups Nov 16 '17
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