Characteristic Classes - MixedAlgebra

[DeRhamSource]

This project is my master thesis. I want to implement a computation of characteristic classes of vector bundles out of their curvature matrices. The algorithm is based on this short script.

In this first step, the graded algebra of "mixed" differential forms of a manifold will be introduced so one can use the matrix framework of sage in the following steps.

A demo notebook is provided at https://github.com/DeRhamSource/MixedFormNotebook

CC: @egourgoulhon @tscrim

Component: geometry

Keywords: characteristic classes

Author: Michael Jung

Branch/Commit: cdfaf6d

Reviewer: Eric Gourgoulhon, Travis Scrimshaw

Issue created by migration from https://trac.sagemath.org/ticket/27584

[DeRhamSource]

Changed keywords from none to characteristic classes

[DeRhamSource]

Author: Michael Jung

[DeRhamSource]

Description changed:

--- 
+++ 
@@ -1 +1,3 @@
+This project is my master thesis. I want to implement a computation of characteristic classes of vector bundles out of their curvature matrices. The algorithm is based on [this](https://www.math.uni-potsdam.de/fileadmin/user_upload/Prof-Geometrie/Dokumente/Lehre/Lehrmaterialien/charakteristisch.pdf) short script.
 
+In a first step, the graded algebra of "mixed" differential forms of a manifold will be introduced so one can use the matrix framework of sage in the following steps.

[DeRhamSource]

Description changed:

--- 
+++ 
@@ -1,3 +1,3 @@
 This project is my master thesis. I want to implement a computation of characteristic classes of vector bundles out of their curvature matrices. The algorithm is based on [this](https://www.math.uni-potsdam.de/fileadmin/user_upload/Prof-Geometrie/Dokumente/Lehre/Lehrmaterialien/charakteristisch.pdf) short script.
 
-In a first step, the graded algebra of "mixed" differential forms of a manifold will be introduced so one can use the matrix framework of sage in the following steps.
+In this first step, the graded algebra of "mixed" differential forms of a manifold will be introduced so one can use the matrix framework of sage in the following steps.

[DeRhamSource]

Branch: u/DeRhamSource/char_class_algebra

[DeRhamSource]

Changed branch from u/DeRhamSource/char_class_algebra to u/gh-DeRhamSource/char_class_algebra

[DeRhamSource]

Changed branch from u/gh-DeRhamSource/char_class_algebra to none

[DeRhamSource]

Branch: u/gh-DeRhamSource/characteristic_classes___mixedalgebra

[sagetrac-git]

Branch pushed to git repo; I updated commit sha1. New commits:

49f21e5

Initial version (without doctests)