What is a differentiable variety?

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SUMMARY

A differentiable variety, commonly referred to as a manifold, is a mathematical structure that resembles Euclidean space locally, allowing for the application of analytical and topological methods. In algebraic geometry, varieties are defined as the zeros of multivariate polynomials, leading to the study of algebraic varieties through ring theory. Differentiable varieties, on the other hand, are explored using differential geometry techniques. The discussion emphasizes the distinction between algebraic and differentiable varieties while suggesting the inclusion of algorithm varieties as a third category relevant to computer science.

PREREQUISITES
  • Understanding of manifolds in differential geometry
  • Familiarity with algebraic varieties in algebraic geometry
  • Knowledge of multivariate polynomials and their zeros
  • Basic concepts of ring theory
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  • Study the properties and applications of differentiable manifolds
  • Explore algebraic varieties and their geometric interpretations
  • Learn about the role of ring theory in algebraic geometry
  • Investigate algorithm varieties and their significance in computer science
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Mathematicians, students of geometry, computer scientists, and anyone interested in the theoretical foundations of algebraic and differentiable varieties.

Opressor
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In mathematics, variety is a generalization of the surface idea. There are several types of varieties, according to the properties they possess. The most usual are the topological varieties and the differentiable varieties. but I still do not know what it is!
 
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To answer the title question: It is called a manifold and locally a Euclidean space such that we can apply analytical and topological methods.

Variety is usually called "algebraic variety" in algebraic geometry. They are defined as the zeros of multivariate polynomials, which lead to ideals in rings, so that ring theory is applicable to investigate the geometry of these surfaces. However, they are called manifolds, when similar is done with means of analysis and topology to investigate the (differential) geometry. I haven't seen these concept mixed, it's a bit of a stretch.
Opressor said:
... I still do not know what it is!
This isn't the place, neither for a lecture in algebraic geometry, nor in differential geometry. How could I answer such a question? They are surfaces as you have said, defined by equations. So this answers your question and probably simultaneously doesn't. Can you be more specific? Otherwise I have to recommend our Science and Math Textbooks forum, where you can find or ask for appropriate book recommendations.

Btw, if you add algorithm varieties to your list, you'll get a third kind and computer science as toolbox.
 
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