simplex

From Latin simplex (“simple”).

In the mathematical sense, apparently first used (in German) in 1902, Pieter Hendrik Schoute, Mehrdimensionale Geometrie, where Schoute first suggests the term Simplicissimum, but then from the next page decides to use simplex "for short".[1] In his pioneering works on algebraic topology, Henri Poincaré had previously introduced the concept, but not the actual term simplex.

• IPA^(key): /ˈsɪmplɛks/

• Audio (Southern England)

  (file)

simplex (not comparable)

1. Single, simple; not complex.
2. (telecommunications) Unidirectional.

• monoplex
• uniplex

• (antonym(s) of “simple”): complex
• (antonym(s) of “unidirectional”): duplex (bidirectional)

(unidirectional):

• half-duplex
• semiduplex
• full duplex

simplex (plural simplexes or simplices or simplicia)

1. (geometry, algebraic topology) An analogue in a space of arbitrary dimensionality of the triangle or tetrahedron; the convex hull of n+1 linearly independent points in n-dimensional space; in other words, the triangle, tetrahedron etc., generalized to an arbitrary number of dimensions.
2. (linguistics) A monomorphemic word, one without affixes.

   “-ology” is usually a suffix, but it can be used on its own as a simplex as well.

   • 1978, Helga Harries-Delisle, “Contrastive Emphasis and Cleft Sentences”, in Universals of Human Language, edited by Joseph H. Greenberg, →ISBN, page 460:

     The only indication that 139. is a simplex is the sentence intonation and the absence of a break between the verb and the subject.

• monoplex

• complex
• subplex

From Proto-Italic *sempleks, from the same root as semel +‎ -plex.

• (Classical) IPA^(key): /ˈsim.pleks/, [ˈs̠ɪmpɫ̪ɛks̠]
• (modern Italianate Ecclesiastical) IPA^(key): /ˈsim.pleks/, [ˈsimpleks]

simplex (genitive simplicis, comparative simplicior, superlative simplicissimus, adverb simpliciter); third-declension one-termination adjective

1. single
2. simple, plain, uncompounded
3. pure, unmixed
4. sincere, naive, frank, open, without guile, guileless, unsuspecting
   • 8 CE, Ovid, Fasti 2.225–226:

     male crēditis hostī: simplex nōbilitās, perfida tēla cave!

     You do wrong to trust the enemy: Guileless nobles, beware of treacherous weapons!

Third-declension one-termination adjective.

• simplicābilis
• simplicitās
• simpliciter

• duplex
• simplus
• triplex
• quadruplex

• Old Leonese:
  • Mirandese: simples
• Old Galician-Portuguese: simplez
  • Portuguese: simples, símplice
• → Asturian: simple
• → Catalan: simple
• → Dutch: simpel
• → English: simplex
• → Friulian: sempliç
• → Galician: simple
• → German: simpel
  • → Norwegian: simpel
• → Italian: semplice
• → Middle Low German: simpel
  • → Old Swedish: simpel
    • Swedish: simpel
      • → Finnish: simppeli
• → Old French: simple, sinple
  • French: simple
    • → Romanian: simplu
  • → Middle English: symple, simple
    • Scots: semple
    • English: simple
• → Romansch: simpel, sempel
• Sicilian: sìmprici, sìmplici
• → Spanish: simple
  • > Chavacano: simple (inherited)
• → Proto-Brythonic: *sɨml
  • Middle Welsh: symyl
    • Welsh: syml

• “simplex”, in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
• “simplex”, in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
• simplex in Charles du Fresne du Cange’s Glossarium Mediæ et Infimæ Latinitatis (augmented edition with additions by D. P. Carpenterius, Adelungius and others, edited by Léopold Favre, 1883–1887)
• simplex in Gaffiot, Félix (1934) Dictionnaire illustré latin-français, Hachette.

Borrowed from French simplex.

simplex n (uncountable)

1. simplex