List questions from map-projections

Published on 29 Apr 2026 - 22:06

41

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How can I extract the equations from this 3D projection graph?

Published on 25 Mar 2026 - 22:02

336

Views

Is Mercator projection an affine trasformation?

Published on 25 Mar 2026 - 23:37

36

Views

Mapping of a unit circle to a lune of a unit sphere quarter

Published on 25 Mar 2026 - 23:39

47

Views

Basis of the polynomial with degree less or equal 2

Published on 26 Mar 2026 - 1:10

40

Views

Proof of integral substitution rule

Published on 25 Mar 2026 - 22:10

45

Views

If $U \subset Y \subset \mathbb{R}^n$, and $U$ is open relative to $Y$, then is $\Pi_k(U)$ open relative to $\Pi_k(Y)$? ($\Pi_k$ is a projection map)

Published on 26 Mar 2026 - 1:23

129

Views

Is there an easy way to convert a partial arc length or movement along an elliptic curve into an X,Y position?

Published on 25 Mar 2026 - 22:05

91

Views

In Spherical Mercator Tile coordinates, how to go one zoom-level deeper but span the same area?

Published on 25 Mar 2026 - 22:03

97

Views

Projection operator fixed up to a constant

Published on 11 Apr 2026 - 2:05

42

Views

Closure of the inverse image under the projection map

Published on 12 Apr 2026 - 2:07

36

Views

Name of a map coupled with the identity

Published on 25 Mar 2026 - 23:36

171

Views

Defining an injective map from the algebraic numbers to the set of integer coefficient polynomials.

Published on 25 Mar 2026 - 23:37

List Question

Vector Projections

How can I extract the equations from this 3D projection graph?

Is Mercator projection an affine trasformation?

Mapping of a unit circle to a lune of a unit sphere quarter

Basis of the polynomial with degree less or equal 2

Proof of integral substitution rule

If $U \subset Y \subset \mathbb{R}^n$, and $U$ is open relative to $Y$, then is $\Pi_k(U)$ open relative to $\Pi_k(Y)$? ($\Pi_k$ is a projection map)

Is there an easy way to convert a partial arc length or movement along an elliptic curve into an X,Y position?

In Spherical Mercator Tile coordinates, how to go one zoom-level deeper but span the same area?

Projection operator fixed up to a constant

Closure of the inverse image under the projection map

Name of a map coupled with the identity

Defining an injective map from the algebraic numbers to the set of integer coefficient polynomials.

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