homotopy obstruction - meaning and definition. What is homotopy obstruction
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What (who) is homotopy obstruction - definition

Obstruction (homotopy)

Bowel obstruction         
  •  doi = 10.3791/1931 }}</ref>
  • Upright abdominal X-ray of a person with a large bowel obstruction showing multiple air fluid levels and dilated loops of bowel
  • A small bowel obstruction as seen on CT
  • Upright abdominal X-ray demonstrating a small bowel obstruction. Note multiple air fluid levels.
HUMAN DISEASE
Intestinal obstruction; Obstructed bowel; Intestinal Obstruction; Bowel blockage; Small bowel obstruction; Intestinal blockage; Large bowel obstruction; Causes of bowel obstruction
Bowel obstruction, also known as intestinal obstruction, is a mechanical or functional obstruction of the intestines which prevents the normal movement of the products of digestion. Either the small bowel or large bowel may be affected.
Obstruction theory         
In mathematics, obstruction theory is a name given to two different mathematical theories, both of which yield cohomological invariants.
obstruction of justice         
ACT OF IMPEDING INVESTIGATION OR COURTS
Obstruction of Justice; Obstructing justice; Obstruct justice
n. an attempt to interfere with the administration of the courts, the judicial system or law enforcement officers, including threatening witnesses, improper conversations with jurors, hiding evidence or interfering with an arrest. Such activity is a crime.

Wikipedia

Obstruction theory

In mathematics, obstruction theory is a name given to two different mathematical theories, both of which yield cohomological invariants.

In the original work of Stiefel and Whitney, characteristic classes were defined as obstructions to the existence of certain fields of linear independent vectors. Obstruction theory turns out to be an application of cohomology theory to the problem of constructing a cross-section of a bundle.