# Fame.am profile — machine-readable export
# Canonical URL: https://fame.am/person/johann-rahn
# Generated: 2026-08-14T11:46:34.353Z

schema: https://schema.org/Person
url: "https://fame.am/person/johann-rahn"
name: "Johann Rahn"
slug: "johann-rahn"
description: "Johann Heinrich Rahn was a Swiss mathematician who is credited with the first use of the division sign, ÷ and the therefore sign, ∴. The symbols were used in Teutsche Algebra, published in 1659. John Pell collaborated with Rahn in this book, which contains an example of the Pell equation. It is uncertain whether Rahn or Pell was responsible for introducing the symbols."
tagline: "Mathematician (1622-1676)"
image: "https://upload.wikimedia.org/wikipedia/commons/thumb/a/a3/Teutsche_Algebra_1659.png/330px-Teutsche_Algebra_1659.png"
gender: "male"
country:
  name: "Switzerland"
  isoCode: "CH"
category:
  name: "Academics"
  slug: "academics"
profileType:
  name: "Academic"
  slug: "academic"
  entityType: "https://www.wikidata.org/entity/Q39631"
birthDate: "1622-03-10"
deathDate: "1676-05-27"
livingStatus: "DECEASED"
scores:
  popularity:           40.13
  momentum:             0
  historical:           8.074334666666667
  currentAttention:     0
  sourceConfidence:     50.00000000000001
  profileCompleteness:  70
  trendDirection:       "FALLING"
ranks:
  global:   null
  country:  null
  category: null
sources:
  - url: "https://uk.wikipedia.org/wiki/%D0%99%D0%BE%D0%B3%D0%B0%D0%BD%D0%BD_%D0%A0%D0%B0%D0%BD"
    title: "Йоганн Ран"
    type:  "WIKIPEDIA"
  - url: "https://ca.wikipedia.org/wiki/Johann_Heinrich_Rahn"
    title: "Johann Heinrich Rahn"
    type:  "WIKIPEDIA"
  - url: "https://de.wikipedia.org/wiki/Johann_Heinrich_Rahn_(Mathematiker)"
    title: "Johann Heinrich Rahn (Mathematiker)"
    type:  "WIKIPEDIA"
  - url: "https://en.wikipedia.org/wiki/Johann_Heinrich_Rahn"
    title: "Johann Heinrich Rahn"
    type:  "WIKIPEDIA"
  - url: "https://es.wikipedia.org/wiki/Johann_Heinrich_Rahn"
    title: "Johann Heinrich Rahn"
    type:  "WIKIPEDIA"
  - url: "https://fr.wikipedia.org/wiki/Johann_Heinrich_Rahn"
    title: "Johann Heinrich Rahn"
    type:  "WIKIPEDIA"
  - url: "https://pl.wikipedia.org/wiki/Johann_Rahn"
    title: "Johann Rahn"
    type:  "WIKIPEDIA"
  - url: "https://ru.wikipedia.org/wiki/%D0%A0%D0%B0%D0%BD%2C_%D0%98%D0%BE%D0%B3%D0%B0%D0%BD%D0%BD"
    title: "Ран, Иоганн"
    type:  "WIKIPEDIA"
  - url: "https://tt.wikipedia.org/wiki/%D0%98%D0%BE%D0%B3%D0%B0%D0%BD%D0%BD_%D0%A0%D0%B0%D0%BD"
    title: "Иоганн Ран"
    type:  "WIKIPEDIA"
  - url: "https://www.wikidata.org/wiki/Q3180572"
    title: "Wikidata"
    type:  "WIKIDATA"

# bio (long form, separated for readability)
bio: |
  Imported from discovery source: wikidata-dump