What is the Connection Between Fibre Bundles and Their Components?

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Discussion Overview

The discussion centers around the concept of fibre bundles in topology, specifically exploring the relationships between the total space (E), base manifold (B), fibre (F), and the role of the projection map (p) and homeomorphisms (phi). Participants seek clarification on these relationships and the construction of fibre bundles.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification

Main Points Raised

  • One participant describes E as a family of copies of F, parametrized by B, suggesting this view may help integrate information about B and F into E, with G facilitating this combination.
  • Another participant questions whether F can be defined as p^{-1}(x) for x in B, and whether this definition limits the generality of F, raising the issue of whether fibres are constructed from a specific choice or are independently chosen.
  • A later reply expresses gratitude for a book recommendation, indicating that the material has clarified their understanding.
  • Another participant notes that while the recommended book is a classic with clear examples, the notation differs from contemporary literature, and suggests studying covering spaces as a precursor to understanding fibre bundles.

Areas of Agreement / Disagreement

Participants express varying levels of understanding and clarity regarding the definitions and relationships within fibre bundles. There is no consensus on the independence of fibres or the implications of defining F in relation to p.

Contextual Notes

Participants reference a classic text for further exploration, indicating that their understanding may depend on the definitions and examples provided therein. There is an acknowledgment of potential differences in notation between older and contemporary texts.

Who May Find This Useful

This discussion may be useful for those studying topology, particularly in understanding fibre bundles and their components, as well as for readers interested in historical and contemporary approaches to the topic.

matness
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In the definition of fibre bundle we have a structure consist of (E, B,F, G, p, phi)
E:total space
B:base manifold = E/R where R is a relation
p:projection map from E to B
F: fibre
G:lie group acting on F etc.

the relation between E and B is obvious but i don't get connection between F and E also the roles of phi(family of homeomorphisms) or G exactly.

I don't want to just read the defn and pass
I stucked at this defn and really need help.
Can you give any explanation or an example ?
 
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E is thought of a family of copies of F, parametrized by B.

hopefully by viewing E this way one can combine in formation about B and F into information on E, using G as a way to see how to combine it.basic example is E = tangent bundle to B, with G = linear group of coord changes in the tangent spaces.

the 50 year old book, topology of fibre bundles, by steenrod is still a classic, and just reading the first few pages of examples gives already a good feel for the concept.
 
Can we say F consists of p^{-1} (x) where x€B
or does this destroy generality of F?
Do we always construct E starting from fibersc?
..Or are they independently chosen?

(Also thanks for book suggestion, it seems from books.google that what i want is there.Unfortuanetely i have to wait for the library's opening hour)
 
Last edited:
thank you again for the book
now everything is clear
 
mathwonk said:
the 50 year old book, topology of fibre bundles, by steenrod is still a classic, and just reading the first few pages of examples gives already a good feel for the concept.
I own a copy of the book, and it is good with clear examples. Though the notations are a bit different from today's literature on fiber bundles. It's perhaps a good idea to study covering spaces from Munkres's Topology first.
 

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