About an inequality in inner product space with the best approximation property
140835
Inner Product Space Inequality
106815
Better bound for integral inequality
86635
Optimizing $(X_{n}+c)^{2}$ to show that $P(\overline{X}_{n}\geq \lambda) \leq E(X_{n}^{2})/(EX_{n}^{2}+ \lambda^{2})$
84437
Prove that the projection $p_i$ from the product space $X_I S_i \tau$ into $S_i \tau_i$ is open for each $i \in I$
17159
Proof of Closest Point Theorem in Hilbert Space
80873
Kind of converse of Kolmogorov maximal inequality
56818
Prove that if $A$ is positive, then $\exists\;\alpha>0$ such that $\langle Ax, x \rangle\geq \alpha|x|^2$ for $x\in\Bbb{R}^n$
17336
Least norm in convex set in Banach space
108505
Matrix Concentration for Products- Orthogonality Property
93165
A projection satisfying $\| Px \| \leq \|x\|$ for all $x$ is an orthogonal projection
60988
Convergence in measure - product
37072
Sharp interpolation inequality for Lebesgue spaces
76140
The supremum norm is submultiplicative
20309
Product and sum of positive operators is positive
128917
Inner Product on $\mathbb{R}$ and on $\mathbb{C}$
69766
Is every normed vector space, an inner product space
83360
The completion of a separable inner product space is a separable Hilbert space