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pappus    
n. 冠毛

冠毛

pappus
n 1: calyx composed of scales or bristles or featherlike hairs
in plants of the Compositae such as thistles and dandelions


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  • Pappus of Alexandria | Greek Mathematician Ancient Geometer - Britannica
    Pappus of Alexandria was the most important mathematical author writing in Greek during the later Roman Empire, known for his Synagoge (“Collection”), a voluminous account of the most important work done in ancient Greek mathematics
  • Pappus (290 - 350) - Biography - MacTutor History of Mathematics
    Pappus, of Alexandria, philosopher, lived about the time of the Emperor Theodosius the Elder [379 AD - 395 AD], when Theon the Philosopher, who wrote the Canon of Ptolemy, also flourished
  • Pappus - Master Gardeners of Northern Virginia
    pappus: an appendage of the cypsela (fruit) of the Asteraceae consisting of one to many bristles, awns, scales, setae, or coronas that assists in seed dispersal The word pappus might bring to mind dandelions and the “puff ball” seed heads you may have played with in your youth
  • Pappus - definition of pappus by The Free Dictionary
    A modified calyx, composed of scales, bristles, or featherlike hairs, in plants of the composite family, such as the dandelion and the thistle [Latin, old man, down on certain seeds, from Greek pappos; see papa in Indo-European roots ] American Heritage® Dictionary of the English Language, Fifth Edition
  • Biography:Pappus of Alexandria - HandWiki
    Pappus of Alexandria ( ˈpæpəs ; Greek: Πάππος ὁ Ἀλεξανδρεύς; c 290 – c 350 AD) was a Greek mathematician of Late Antiquity known for his Synagoge (Συναγωγή) or Collection (c 340), [1] and for Pappus's hexagon theorem in projective geometry
  • Pappus | EBSCO Research Starters
    Pappus of Alexandria was a significant figure in the history of mathematics, active during the decline of Greek mathematical tradition, roughly between 284 and 305 CE Though little is known about his personal life, he is recognized as a philosopher and mathematician, likely holding a teaching position
  • What is a pappus? - Answers
    Pappus, in a composite flower, is the element of the individual disk and ray flowers that surrounds the flower structure, in the same manner at the base as calyx does in a non-compound flower
  • Pappus Theorem - MathPages
    Pappus' Theorem: Pappus of Alexandria was a Greek mathematician who lived around the end of the third century AD, although the exact date is uncertain
  • Pappus Theorem - Alexander Bogomolny
    Pappus' Theorem (Consider the hexagon AbCaBc ) The points of intersection of the opposite sides of the hexagon whose vertices lie alternatively on two straight lines, lie on a straight line
  • Pappus of Alexandria, (fl. c. 300-c. 350) - Department of Mathematics
    Pappus of Alexandria, (fl c 300-c 350)! 1 Introduction Very little is known of Pappus' life Moreover, very little is known of what his actual contributions were or even exactly when he lived We do know that he recorded in one of his commentaries on the Almagest2 that he observed a solar eclipse on October 18, 320 He is





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