What is the definition of 'space'?

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Discussion Overview

The discussion revolves around the definition of "space" in a mathematical context, exploring various interpretations and the need for a rigorous definition. Participants consider different types of spaces, such as vector spaces and topological spaces, and the implications of these definitions in both mathematics and physics.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • Some participants note that the term "a space" refers to various mathematical constructs, each with distinct properties and structures.
  • One participant emphasizes that a space fundamentally requires a set, suggesting that the concept of a set is more elementary than that of a space.
  • Another participant argues that while there is no rigorous definition of space, it can be understood as a set with additional structures, such as vector addition or a metric function.
  • A participant proposes that a category theorist might be able to formulate a general rigorous definition of space, involving collections of sets and operations, although this is speculative.

Areas of Agreement / Disagreement

Participants express differing views on the definition of space, with no consensus on a singular rigorous definition. Multiple interpretations and types of spaces are acknowledged, indicating ongoing debate.

Contextual Notes

Limitations include the vagueness of the term "space" and the dependence on specific mathematical contexts. The discussion highlights the complexity and variability in definitions across different mathematical disciplines.

quasar987
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Mathworld's definition: "The concept of a space is an extremely general and important mathematical construct. Members of the space obey certain addition properties."

It is quite vague. What would a rigourous definition be?
 
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Notice that it says "a space" not just "space". There are a number of different kinds of "spaces" used in mathematics (vector space, topological space (in which members do not "obey certain addition properties"!), etc.).

If you want a definition of "space" (that in which we all live), then you should ask in a physics forum.
 
In the most abstract sense,u can't have a space without a set.So the notion of "set" is the trully elementary one.A space is a set whose elements & subsets have certain properties.U can't be too rigurous,really.

Daniel.
 
There isn't really a rigourous definition, but ea space si basically a ste with some additonal structure defined on it.

So for exmaple a vector space has the addiotnal structure of an asosciated field, vector additon and scalar mulpilcation; a metric space has the additonal structure of a metric function; a topological space as the additonal structure of a topology and so on.
 
I bet there's got to be a category theorist out who can take these general notions and come up with a general rigorous definition. Like a space is a collection of sets, an operation between the sets and a set of axioms that must be satisfied. ie one of the sets in the collection would be the elements of the space, another set could be a topology on the space and the operation between those two sets would be inclusion.

I'm not saying this would be the categorist's definition but I bet there is one. A categorist just can't help but to generalize these sorts of things.
 

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