User:Leigh.Samphier/P-adicNumbers

$p$-adic Numbers
Let $\struct {R, \norm{\,\cdot\,}}$ be a normed division ring with zero $0_R$ and unity $1_R$.

Let $\struct {R, \norm{\,\cdot\,}}$ be a non-Archimedean normed division ring with zero $0_R$ and unity $1_R$.

Let $d$ be the metric induced by the norm $\norm{\,\cdot\,}$.

Let $\tau$ be the topology induced by the norm $\norm{\,\cdot\,}$.

Let $\norm {\,\cdot\,}_p$ be the $p$-adic norm on the rationals $\Q$ for some prime $p$.

Let $p$ be a prime number.

Let $\struct {\Q_p, \norm {\,\cdot\,}_p}$ be the $p$-adic numbers.

Cleanup/Refactor
Definition:P-adic Number


 * P-adic Expansion is a Cauchy Sequence in P-adic Norm/Represents a P-adic Number


 * P-adic Norm not Complete on Rational Numbers/Proof 3


 * Null Sequences form Maximal Left and Right Ideal


 * P-adic Norms are Not Equivalent


 * Non-Null Cauchy Sequence in Non-Archimedean Norm is Eventually Stationary


 * P-adic Norm of p-adic Number is Power of p


 * P-adic Expansion is a Cauchy Sequence in P-adic Norm


 * P-adic Expansion is a Cauchy Sequence in P-adic Norm/Represents a P-adic Number


 * Equivalence Class in P-adic Integers Contains Unique Coherent Sequence


 * Equivalence Class in P-adic Integers Contains Unique Coherent Sequence/P-adic Expansion


 * Equivalence Class in P-adic Numbers Contains Unique P-adic Expansion


 * Equivalence Class in P-adic Integers Contains Unique Coherent Sequence/Lemma 3


 * Equivalence Class in P-adic Integers Contains Unique Coherent Sequence/Lemma 4


 * Representatives of same P-adic Number iff Difference is Null Sequence


 * P-adic Norm of P-adic Expansion is determined by First Nonzero Coefficient


 * P-adic Expansion Representative of P-adic Number is Unique


 * P-adic Expansion Less Intial Zero Terms Represents Same P-adic Number


 * Rational Numbers are Dense Subfield of P-adic Numbers


 * Field Operations of P-adic Numbers as Quotient of Cauchy Sequences


 * Definition:P-adic Number/Quotient of Cauchy Sequences in P-adic Norm/Representative


 * Definition talk:P-adic Number


 * Delete Definition:P-adic Number/Quotient of Cauchy Sequences in P-adic Norm


 * Delete Definition:P-adic Numbers as Quotient of Cauchy Sequences


 * Delete Definition:P-adic Number/Quotient of Cauchy Sequences in P-adic Norm/Representative

Is definition 2 needed in:
 * Equivalence of Definitions of Convergent P-adic Sequence

Leigh.Samphier/Sandbox/Definition:P-adic Norm

Leigh.Samphier/Sandbox/Definition:P-adic Norm/Rational Numbers

Leigh.Samphier/Sandbox/Definition:P-adic Norm on Rational Numbers

Leigh.Samphier/Sandbox/Definition:P-adic Norm/Rational Numbers/Definition 1

Leigh.Samphier/Sandbox/Definition:P-adic Norm/Rational Numbers/Definition 2

Leigh.Samphier/Sandbox/Equivalence of Definitions of P-adic Norms

Leigh.Samphier/Sandbox/Equivalence of Definitions of P-adic Norms/Lemma 1

Leigh.Samphier/Sandbox/P-adic Norm Characterisation of Divisibility by Power of p

Leigh.Samphier/Sandbox/Definition:P-adic Norm on P-adic Numbers

Leigh.Samphier/Sandbox/Definition:P-adic Norm/P-adic Numbers

Leigh.Samphier/Sandbox/Definition:P-adic Norm/P-adic Numbers/Notation

Leigh.Samphier/Sandbox/Definition:P-adic Metric

Leigh.Samphier/Sandbox/Definition:P-adic Metric/Rational Numbers

Leigh.Samphier/Sandbox/Definition:P-adic Metric on Rational Numbers

Leigh.Samphier/Sandbox/Definition:P-adic Metric/P-adic Numbers

Leigh.Samphier/Sandbox/Metric on P-adic Numbers Extends Metric on Rationals

Leigh.Samphier/Sandbox/Integers with Metric Induced by P-adic Valuation

Leigh.Samphier/Sandbox/Restricted P-adic Metric is Metric

Delete Definition:P-adic Metric/Restricted

Delete Definition:Restricted P-adic Metric/Definition 1

Delete Definition:Restricted P-adic Metric/Definition 2

Continuing Svetlana Katok Book

 * : $\S 1.4$ The field of $p$-adic numbers $\Q_p$
 * P-adic Norm of P-adic Expansion is determined by First Nonzero Coefficient

Leigh.Samphier/Sandbox/Inclusion Mapping on Normed Division Subring is Distance Preserving Monomorphism

Leigh.Samphier/Sandbox/Complete Normed Division Ring is Completion of Dense Subring

Leigh.Samphier/Sandbox/Distance-Preserving Homomorphism Preserves Norm

Leigh.Samphier/Sandbox/Element of Completion is Limit of Sequence in Normed Division Ring

Leigh.Samphier/Sandbox/Element of Completion is Limit of Sequence in Normed Division Ring/Corollary

Leigh.Samphier/Sandbox/Normed Division Ring Determines Norm on Completion

Leigh.Samphier/Sandbox/Normed Division Ring Determines Norm on Completion/Corollary

Leigh.Samphier/Sandbox/P-adic Norm of p-adic Number is Power of p

Leigh.Samphier/Sandbox/P-adic Norm of p-adic Number is Power of p/Lemma

Leigh.Samphier/Sandbox/P-adic Norm of p-adic Number is Power of p/Proof 1

Leigh.Samphier/Sandbox/P-adic Norm of p-adic Number is Power of p/Proof 2

Leigh.Samphier/Sandbox/P-adic Expansion Representative of P-adic Number is Unique

Leigh.Samphier/Sandbox/Representative of P-adic Sum

Leigh.Samphier/Sandbox/Representative of P-adic Product

Leigh.Samphier/Sandbox/Cauchy Sequence Represents P-adic Number

Leigh.Samphier/Sandbox/Constant Sequence Represents Rational in P-adic Numbers

Continuing Fernando Q. Gouvea Book

 * : $\S 3.3$ Exploring $\Q_p$, Lemma $3.3.8$
 * P-adic Number is Limit of Unique P-adic Expansion

Every P-adic Number is Limit of P-adic Expansion
Leigh.Samphier/Sandbox/Sequence Converges in Completion iff Sequence Represents Limit

Leigh.Samphier/Sandbox/Distinct P-adic Expansions Converge to Distinct P-adic Numbers

Leigh.Samphier/Sandbox/P-adic Number is Limit of Unique P-adic Expansion - Complete the uniqueness

Characterisation of P-adic Units
Leigh.Samphier/Sandbox/Set of P-adic Units is Unit Sphere

Leigh.Samphier/Sandbox/Characterization of Rational P-adic Units

Leigh.Samphier/Sandbox/P-adic Expansion of P-adic Units