Not signed in

Want to take part in these discussions? Sign in if you have an account, or apply for one below

• Username
• Password
• Remember me

• Sign in using OpenID
• Remember me

• Forgot your password?
• Apply for membership

2-category 2-category-theory abelian-categories adjoint algebra algebraic algebraic-geometry algebraic-topology analysis analytic-geometry arithmetic arithmetic-geometry book bundles calculus categorical categories category category-theory chern-weil-theory cohesion cohesive-homotopy-type-theory cohomology colimits combinatorics complex complex-geometry computable-mathematics computer-science constructive cosmology deformation-theory descent diagrams differential differential-cohomology differential-equations differential-geometry digraphs duality elliptic-cohomology enriched fibration foundation foundations functional-analysis functor gauge-theory gebra geometric-quantization geometry graph graphs gravity grothendieck group group-theory harmonic-analysis higher higher-algebra higher-category-theory higher-differential-geometry higher-geometry higher-lie-theory higher-topos-theory homological homological-algebra homotopy homotopy-theory homotopy-type-theory index-theory integration integration-theory internal-categories k-theory lie-theory limits linear linear-algebra locale localization logic mathematics measure measure-theory modal modal-logic model model-category-theory monad monads monoidal monoidal-category-theory morphism motives motivic-cohomology nlab noncommutative noncommutative-geometry number-theory of operads operator operator-algebra order-theory pages pasting philosophy physics pro-object probability probability-theory quantization quantum quantum-field quantum-field-theory quantum-mechanics quantum-physics quantum-theory question representation representation-theory riemannian-geometry scheme schemes set set-theory sheaf simplicial space spin-geometry stable-homotopy-theory stack string string-theory superalgebra supergeometry svg symplectic-geometry synthetic-differential-geometry terminology theory topology topos topos-theory tqft type type-theory universal variational-calculus

1. • CommentRowNumber1.
   • CommentAuthorUrs
   • CommentTimeJul 18th 2022
   • (edited Jul 18th 2022)
   • PermaLink
   Author: Urs
   Format: MarkdownItexI have adjusted the first paragraphs (previously a numbered "Definition" -- have now made it an "Idea"-section: Added mentioning of $\mathbb{R}^n$ as an affine space and its original relation as such to Descartes' "analytic geometry" ("[[Cartesian geometry]]", but we don't have such an entry yet.) Removed the suggestion (from [rev 13](https://ncatlab.org/nlab/revision/diff/cartesian+space/13)) that one would call any $n$-fold cartesian product, such as of a set $K$, a "Cartesian space". <a href="https://ncatlab.org/nlab/revision/diff/cartesian+space/20">diff</a>, <a href="https://ncatlab.org/nlab/revision/cartesian+space/20">v20</a>, <a href="https://ncatlab.org/nlab/show/cartesian+space">current</a>

   I have adjusted the first paragraphs (previously a numbered “Definition” – have now made it an “Idea”-section:

   Added mentioning of $\mathbb{R}^n$ as an affine space and its original relation as such to Descartes’ “analytic geometry” (“Cartesian geometry”, but we don’t have such an entry yet.)

   Removed the suggestion (from rev 13) that one would call any $n$-fold cartesian product, such as of a set $K$, a “Cartesian space”.

   diff, v20, current