:

  •  
                                                          

    (Wight)

    (Wight)

    , . -. 381 2, 240 . - . . - , , .

    () (Brouwer) (1605 1606-1638)
    ( . additivus - )
    (?-1138)
    -
    () (Halley) (1656-1742)
    :