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Numerical algorithms for problems in analysis and algebra, scientific computation

1 vote
1 answer
85 views

The distance between a collection of points and a sequence of sets

Fix $m \geq 2$, and consider a sequence of sets $$ J_m^{(n)} = \left\{ \frac{2}{mn}+\frac{i-1}{n}\right\}_{i=1}^n. $$ For any collection of $m-1$ points $x_1,...,x_{m-1} \in (0, 1)\cap \mathbb{Q}$, de …
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1 vote
3 answers
748 views

Determining polynomial approximations of piecewise constant functions

Let $t_1 < t_2 < \cdots <t_m$ be real, and $X = \cup_{i=1}^{m-1} (t_i, t_{i+1})$ be a union of real open intervals. Let $f:X \rightarrow \{-1, 1\}$ be any piecewise constant function of form $$ f(x) …
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