Homotopy Type Theory Sandbox (Rev #8, changes)

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The geometric real definition numbers are a simplified model of an numbers. ordered Actual field: computation in reality occurs in the rational numbers.

  • an ordered local ring RR where for all elements xRx \in R, xx is invertible or x=0x = 0

  • equivalently, an ordered local ring which satisfies trichotomy.

The real square root does not actually exist. Instead we have a partial function on the rationals which is only approximately a square root up to some rational tolerance ϵ\epsilon.

The limited principle of omniscience implies that the discrete (i.e. Cauchy, Escardo-Simpson, decidable Dedekind) real numbers are the terminal such an ordered field.

ϵ<sqrt ϵ(x) 2x<ϵ-\epsilon \lt \mathrm{sqrt}_\epsilon(x)^2 - x \lt \epsilon

More The importantly, same it goes implies for that analytic every functions pointwise like continuous the exponential function is and uniformly continuous via the sine and cosine function.lesser limited principle of omniscience.

Revision on January 19, 2025 at 04:21:58 by Anonymous?. See the history of this page for a list of all contributions to it.