# Andrej Arsen'evič Tarkovskij

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[...] Je le vois, mais je ne crois pas [...]

# 90 Questions

 4 About “Trichotomy Law for Real Numbers” 3 Definition of multiplication of real numbers from product of positive dedekind cuts and absolute value 3 Proof by contradiction: $\emptyset \subseteq A$ 2 Proof: $A=\{c_1,c_2,…,c_n\}\subset \Bbb{R} \to A \mbox{ is bounded above }$ 2 Proof: $g\mbox{ is self-adjoint endomorphism}\leftrightarrow \forall i,j \in \{1,2,…,n\}(f(g(b_i),b_j)=f(b_i,g(b_j)))$

# 988 Reputation

 +2 IMO 1979 problem +2 Is there a distance metric for dot product similarity that preserves the ordering of nearest neighbors? +2 Linear Transformations, kernels, and Basis for Range +2 difference between uniform topology and product topology

 9 If $\mathcal{P}(A)=\mathcal{P}(B)$, then $A=B$? 2 Why surjectivity is defined by “for every $y$,there exist $x$ such that$f(x)=y$” instead of “$x_1=x_2\Rightarrow f(x_1)=f(x_2)$” 1 A basis for the image of $f$ 1 Classification of linear algebra 0 solving this question based on homomorphism

# 40 Tags

 9 elementary-set-theory × 18 0 definition × 24 9 proof-verification × 12 0 proof-strategy × 11 2 linear-algebra × 22 0 abstract-algebra × 11 2 functions × 2 0 sequences-and-series × 7 0 real-analysis × 27 0 real-numbers × 5

# 24 Accounts

 Mathematics 988 rep 415 TeX - LaTeX 322 rep 28 Italian Language 121 rep 4 Philosophy 111 rep 3 Stack Overflow 101 rep 1