curvature   157
python - calculate turning points / pivot points in trajectory (path) - Stack Overflow
You finally have to merge adjacent corners to a single corner. E.g. choosing the point with the strongest corner property.

work  curvature  math  splines  derivatives  maps
june 2018 by ohnice
Flat-Earth: Finding the curvature of the Earth
With the help of a simulation, I show, up to what altitudes the earth appears flat, although it actually has a spherical shape. Using some animations, you can learn how to recognize the curvature of the earth, or in what circumstances it appears flat. The simulation can also simulate refraction. I prove by means of photos, how the simulation depicts reality, by superimposing the simulation results onto photos.
flat  earth  globe  simulation  curvature
april 2018 by pmw57
Subgradients - S. Boyd and L. Vandenberghe
If f is convex and x ∈ int dom f, then ∂f(x) is nonempty and bounded. To establish that ∂f(x) ≠ ∅, we apply the supporting hyperplane theorem to the convex set epi f at the boundary point (x, f(x)), ...
pdf  nibble  lecture-notes  acm  optimization  curvature  math.CA  estimate  linearity  differential  existence  proofs  exposition  atoms  math  marginal  convexity-curvature
august 2017 by nhaliday
All About Bends, Shapes, Dimensions, Bend Deductions, etc. in Rebar
Really good stuff (British) about bend types, bend deductions, dimension points of bent rebar.
bend  curvature  deduction  rebar  dimension  goodstuff
july 2017 by brentfarwick
Stages of Diversification
This paper studies the evolution of sectoral concentration in relation to the level of per capita income. We show that various measures of sectoral concentration follow a U-shaped pattern across a wide variety of data sources: countries first diversify, in the sense that economic activity is spread more equally across sectors, but there exists, relatively late in the development process, a point at which they start specializing again. We discuss this finding in light of existing theories of trade and growth, which generally predict a monotonic relationship between income and diversification. (JEL F43, F15, O40)

seems unhealthy to me (complacency)
pdf  study  economics  growth-econ  stylized-facts  correlation  curvature  wealth  wealth-of-nations  distribution  trade  heavy-industry  🎩  group-level  regional-scatter-plots  longitudinal  the-world-is-just-atoms  econ-metrics  econometrics  broad-econ  diversity  entropy-like  nonlinearity  convexity-curvature
june 2017 by nhaliday

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