This is a meta-post which collects links to other posts on this blog with (sometimes implicit) questions that were left unanswered there. This does not necessarily mean that nobody has an answer, just that I did not have one when writing the post. The collection is in reverse chronological order.

- Maximal algebraic connectivity among graphs of boundedÂ degree
- Pi and Python: how 22/7 morphs into 355/113
- Transcendental-free Riemann-Lebesgue lemma
- The closure of periodic functions
- Points of maximal curvature
- Discrete maximum principle for polynomials
- Zeros of Taylor polynomials of (1+z)^p
- The displacement set of nonlinear maps in vector spaces
- The distribution of pow(2, n, n)
- Noncontracting Jordan curves
- Extreme values of a reproducing kernel for polynomials
- Nonexpanding Jordan curves
- Relating integers by differences of reciprocals
- Need for speed vs bounded position and acceleration
- Very fractional geometric progressions with an integer ratio
- The Kolakoski-Cantor set
- Pisot constant beyond 0.843
- Laguerre polynomials under 1
- A limsup exercise: iterating the logistic map and Iterating the logistic map: limsup of nonperiodic orbits
- Kolakoski turtle curve
- Wild power pie
- Autogenerated numbers and Autogenerated numbers 2
- Bi-Lipschitz equivalence and fixed points
- Irrational sunflowers
- Rough isometries
- Retraction by contraction
- Oscillatory explosion
- Normalizing to zero mean or median
- Nonlinear Closed Graph Theorem
- Alternating lacunary series and 1-1+1-1+1-1+â€¦
- Squarish polynomials
- The least distorted curves and surfaces
- Words that contain UIO, and best-fitting lines
- From boring to puzzling in 30 iterative steps
- Real zeros of sine Taylor polynomials
- Fourth order obstacle problem
- Gregory-Newton series
- Recognizing a quadric surface from its traces
- How much multivariable calculus can be done along curves?
- Subspaces and projections
- Diameter vs radius, part II
- Oversampling of polynomials
- Integer sets without singular matrices
- Almost norming functionals, Part 1