Question about hilberts hotel.

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Discussion Overview

The discussion revolves around the concept of Hilbert's Hotel, specifically addressing the implications of having an infinite number of rooms and an infinite number of guests. Participants explore the nature of "packing" the hotel and the ability to accommodate additional guests despite the hotel being "full." The conversation includes theoretical considerations and conceptual clarifications regarding infinite sets.

Discussion Character

  • Conceptual clarification, Debate/contested

Main Points Raised

  • Some participants propose that it is possible to have both a situation where the hotel is "packed" and another where it is not, suggesting flexibility in interpretation.
  • One participant asserts that "packed" in the context of Hilbert's Hotel does not equate to being full in the conventional sense, as there remains capacity for additional guests.
  • Another participant distinguishes between the meanings of "every room is occupied" and "cannot add another person," indicating that these concepts are not synonymous in the context of infinite sets.
  • A later reply confirms the ability to pack the hotel while still being able to add more guests, reflecting an understanding of the paradoxical nature of infinity.

Areas of Agreement / Disagreement

Participants express differing interpretations of what it means to "pack" the hotel, with some agreeing that it is possible to have both scenarios coexist, while others clarify the implications of occupancy in relation to infinity. The discussion remains unresolved regarding the precise definitions and implications of these terms.

Contextual Notes

Limitations include the ambiguity in the term "packed" and the need for clearer definitions regarding occupancy and the addition of guests in the context of infinite sets.

cragar
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So if I have an infinite amount of rooms and an infintie amount of people can I pack the hotel.
And both quantities are countable. Ok so I could just put all the people in the odd numbered rooms and have the even rooms open. But it seems like I could pack the hotel if I wanted too.
Can I constucrt both situations if I want too.
 
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cragar said:
So if I have an infinite amount of rooms and an infintie amount of people can I pack the hotel.
And both quantities are countable. Ok so I could just put all the people in the odd numbered rooms and have the even rooms open. But it seems like I could pack the hotel if I wanted too.
Can I constucrt both situations if I want too.


Yes...and after packed, you can still free an infinite (countable) number of rooms to host an infinite number of new guests.

DonAntonio
 
so you are saying I can have both situations if I want to.
 
"Packed" for Hilbert's Hotel doesn't have the same meaning it would for a normal hotel. Even if all the rooms are assigned, there is still room for another countably infinite number of guests. So in some sense, it is never full.
 
What do you mean by "packed"? If you mean "every room is occupied", yes, you can do that. If you mean you "cannot add another person", no you cannot do that.
For a "hotel with countably infinite rooms", "every room is occupied" and "cannot add another person" are NOT the same.
 
so I can pack the hotel, but I can still add people. Thanks for your responses by the way.
 

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