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### Questions (130)

 9 is $T:C[0,1]\rightarrow C[0,1]$: $x(t)\mapsto x(t^2)$ compact? 7 Give an example of a UFD having a subring which is not a UFD. 6 How to figure whether it is a compact operator 4 Exercise 2.27 from Bazaraa (LP) 4 does $a^2-51b^2=\mp 6$ have a solution for integers?

### Reputation (653)

 +5 if $3^3 2^2 \ | a^2$ then $3^2 2 \ | a$ where a is integer +5 how to find extreme points for 3 variable linear programming +5 Does $F(x)=\int ^{2x-x^2}_0 cos(\frac{1}{1+t^2})dt$ have a maximum or a minimum value? +5 How to show $\lim_{x\to -3} x^2=9$ by $\epsilon$, $\delta$ definition

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### Tags (54)

 0 real-analysis × 59 0 calculus × 15 0 functional-analysis × 43 0 optimization × 15 0 analysis × 20 0 linear-programming × 12 0 measure-theory × 16 0 algebraic-number-theory × 11 0 linear-algebra × 15 0 differential-equations × 11

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