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Q&A Is there a mathematical process resembling the terms "digital"/"discrete" and "analog"/"continuous"?

Discrete sets, as ℕ ℤ and ℚ, are in bijection within themselves, and the number of elements in them is Aleph (א) sub zero. Continuum sets as ℝ or 𝕀 are not in bijection to the former ℕ ℤ ℚ, and th...

posted 4y ago by .                                                .‭  ·  edited 3y ago by deleted user

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#4: Post edited by (deleted user) · 2021-07-23T21:23:18Z (over 3 years ago)
Shouldn't that be deleted altogether?...
  • ### from 10000 feet
  • ~~Digital is a two-valued set.~~
  • Discrete sets, as ℕ ℤ and ℚ, are in [bijection][0] within themselves, and the number of elements in them is [Aleph (א) sub zero][1].
  • Continuum sets as ℝ or 𝕀 [are not in bijection to the former ℕ ℤ ℚ][3], and the number of elements in them is [Aleph (א) sub one][2].
  • [0]: https://en.wikipedia.org/wiki/Bijection
  • [1]: https://en.wikipedia.org/wiki/Aleph_number#Aleph-naught
  • [2]: https://en.wikipedia.org/wiki/Aleph_number#Aleph-one
  • [3]: https://en.wikipedia.org/wiki/Cantor%27s_diagonal_argument
  • Discrete sets, as ℕ ℤ and ℚ, are in [bijection][0] within themselves, and the number of elements in them is [Aleph (א) sub zero][1].
  • Continuum sets as ℝ or 𝕀 [are not in bijection to the former ℕ ℤ ℚ][3], and the number of elements in them is [Aleph (א) sub one][2].
  • [0]: https://en.wikipedia.org/wiki/Bijection
  • [1]: https://en.wikipedia.org/wiki/Aleph_number#Aleph-naught
  • [2]: https://en.wikipedia.org/wiki/Aleph_number#Aleph-one
  • [3]: https://en.wikipedia.org/wiki/Cantor%27s_diagonal_argument
#3: Post edited by user avatar .                                                .‭ · 2020-09-13T15:17:05Z (about 4 years ago)
digital in practice uses application boolean appliances, however that's not a true fact, digital signals can be multivalued
  • ### from 10000 feet
  • Digital is a two-valued set.
  • Discrete sets, as ℕ ℤ and ℚ, are in [bijection][0] within themselves, and the number of elements in them is [Aleph (א) sub zero][1].
  • Continuum sets as ℝ or 𝕀 [are not in bijection to the former ℕ ℤ ℚ][3], and the number of elements in them is [Aleph (א) sub one][2].
  • [0]: https://en.wikipedia.org/wiki/Bijection
  • [1]: https://en.wikipedia.org/wiki/Aleph_number#Aleph-naught
  • [2]: https://en.wikipedia.org/wiki/Aleph_number#Aleph-one
  • [3]: https://en.wikipedia.org/wiki/Cantor%27s_diagonal_argument
  • ### from 10000 feet
  • ~~Digital is a two-valued set.~~
  • Discrete sets, as ℕ ℤ and ℚ, are in [bijection][0] within themselves, and the number of elements in them is [Aleph (א) sub zero][1].
  • Continuum sets as ℝ or 𝕀 [are not in bijection to the former ℕ ℤ ℚ][3], and the number of elements in them is [Aleph (א) sub one][2].
  • [0]: https://en.wikipedia.org/wiki/Bijection
  • [1]: https://en.wikipedia.org/wiki/Aleph_number#Aleph-naught
  • [2]: https://en.wikipedia.org/wiki/Aleph_number#Aleph-one
  • [3]: https://en.wikipedia.org/wiki/Cantor%27s_diagonal_argument
#2: Post edited by user avatar .                                                .‭ · 2020-09-13T09:36:39Z (about 4 years ago)
add another wikipedia link
  • ### from 10000 feet
  • Digital is a two-valued set.
  • Discrete sets, as ℕ ℤ and ℚ, are in [bijection][0] within themselves, and the number of elements in them is [Aleph (א) sub zero][1].
  • Continuum sets as ℝ or 𝕀 do not, and the number of elements in them is [Aleph (א) sub one][2].
  • [0]: https://en.wikipedia.org/wiki/Bijection
  • [1]: https://en.wikipedia.org/wiki/Aleph_number#Aleph-naught
  • [2]: https://en.wikipedia.org/wiki/Aleph_number#Aleph-one
  • ### from 10000 feet
  • Digital is a two-valued set.
  • Discrete sets, as ℕ ℤ and ℚ, are in [bijection][0] within themselves, and the number of elements in them is [Aleph (א) sub zero][1].
  • Continuum sets as ℝ or 𝕀 [are not in bijection to the former ℕ ℤ ℚ][3], and the number of elements in them is [Aleph (א) sub one][2].
  • [0]: https://en.wikipedia.org/wiki/Bijection
  • [1]: https://en.wikipedia.org/wiki/Aleph_number#Aleph-naught
  • [2]: https://en.wikipedia.org/wiki/Aleph_number#Aleph-one
  • [3]: https://en.wikipedia.org/wiki/Cantor%27s_diagonal_argument
#1: Initial revision by user avatar .                                                .‭ · 2020-09-13T09:19:57Z (about 4 years ago)
### from 10000 feet

Digital is a two-valued set.

Discrete sets, as ℕ ℤ and ℚ, are in [bijection][0] within themselves, and the number of elements in them is [Aleph (א) sub zero][1].

Continuum sets as ℝ or 𝕀 do not, and the number of elements in them is [Aleph (א) sub one][2].

[0]: https://en.wikipedia.org/wiki/Bijection

[1]: https://en.wikipedia.org/wiki/Aleph_number#Aleph-naught

[2]: https://en.wikipedia.org/wiki/Aleph_number#Aleph-one