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OP-8771Status unassessedAnalysis

Orthogonal polynomials · Question 3

Stability, hyperbolicity, and zero localization of functions · Historical workshop question

Historical list · status unassessedAs of 2026-09-08Source & evidence ↓

Problem statement

Consider a subspace SS of C[x]\mathbb{C}[x] of codimension kk (defined by kk linear constraints, explicitly given). Given a scalar product on C[x]\mathbb{C}[x], find an orthogonal basis of SS (ordered by degree); some degrees will be missing.

  • Which degrees get skipped?

  • Characterize these orthogonal polynomials.

  • Does this have anything to do with lacunary Pad'e approximants?

Lean 4

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Background

Workshop introduction

A list of the problems from the workshop on stability, hyperbolicity, and zero localization of functions, held December 5-9, 2011, is presented below. The problems have been loosely categorized for convenience, although many of the problems could be listed under several different headings.

Progress & source assessment

Historical workshop record. Current open/solved status has not been independently reassessed.

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References
  1. [1]Stability, hyperbolicity, and zero localization of functions link

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