Results 241 to 250 of about 295,670 (287)
Some of the next articles are maybe not open access.
2014
In this chapter we develop singular homology , an ordinary homology theory, and derive many of its properties.
openaire +1 more source
In this chapter we develop singular homology , an ordinary homology theory, and derive many of its properties.
openaire +1 more source
Spacetime singularities in string theory
Physical Review Letters, 1990Summary: It is shown that a large class of time-dependent solutions to Einstein's equation are classical solutions to string theory. These include metrics with large curvature and some with spacetime singularities. Unlike the case of orbifold singularities, it is shown that string propagation through the singluar region is not well behaved.
Horowitz, Gary T., Steif, Alan R.
openaire +2 more sources
Z n-equivariant singularity theory
Applied Mathematics and Mechanics, 1993The paper gives the basic elements of \(\mathbb{Z}_ n\)-equivariant bifurcation theory; in particular, some results on the normal form and the universal unfolding of a singularity of a \(\mathbb{Z}_ n\)-equivariant mapping are obtained. As an example the case \(n=3\) is treated in some detail.
He, Guowei, Fang, Tong
openaire +1 more source
1994
The purpose of this chapter is to introduce the singular homology theory of an arbitrary topological space. Following the definitions and a proof of homotopy invariance, the essential computational tool (Theorem 1.14) is stated. Its proof is deferred to Appendix I so that the exposition need not be interrupted by its involved constructions.
openaire +1 more source
The purpose of this chapter is to introduce the singular homology theory of an arbitrary topological space. Following the definitions and a proof of homotopy invariance, the essential computational tool (Theorem 1.14) is stated. Its proof is deferred to Appendix I so that the exposition need not be interrupted by its involved constructions.
openaire +1 more source
1984
In 1955 the American mathematician Hassler Whitney published the article ‘Mappings of the plane into the plane’ laying the foundations for a new mathematical theory of singularities of smooth mappings.
openaire +1 more source
In 1955 the American mathematician Hassler Whitney published the article ‘Mappings of the plane into the plane’ laying the foundations for a new mathematical theory of singularities of smooth mappings.
openaire +1 more source
Interactive Singularity Theory
2011This chapter and the following chapters describe the singularity theory of shape invented in the Process Grammar.
openaire +1 more source
Finite-time cosmological singularities and the possible fate of the Universe
Physics Reports, 2023Vasilis K Oikonomou
exaly