giả cầu
Definition
- Adjective:
- Pseudospherical: In mathematics, specifically in differential geometry, describing a surface of constant negative Gaussian curvature. It is a model for a geometry that satisfies the axioms of hyperbolic geometry.
Usage Examples
- Adjective:
- Mặt giả cầu là một mô hình hình học hyperbolic. (A pseudospherical surface is a model of hyperbolic geometry.)
- Nhà toán học đang nghiên cứu các tính chất của mặt giả cầu. (The mathematician is studying the properties of the pseudospherical surface.)
Advanced Usage
- This term is highly specialized and used almost exclusively in advanced mathematical contexts, particularly when discussing non-Euclidean geometries, surface theory, or soliton theory.
Variants and Related Words
- Mặt giả cầu (n): pseudospherical surface.
- Phương trình sine-Gordon mô tả các mặt giả cầu. (The sine-Gordon equation describes pseudospherical surfaces.)
Synonyms
- Pseudospherical: Having the geometric properties of a pseudosphere.
Related Concepts
- Giả cầu is directly related to the pseudosphere, a specific surface of revolution of constant negative curvature, which serves as a local model for hyperbolic geometry, unlike a standard sphere which has constant positive curvature.