?? ?????????? ???????? ?????
?????? ??? ?????
(
??????????
:
Ludolph van Ceulen
) (28 ????? 1540-31 ????? 1610) ?? ???? ???????
??????
???? ???
??????
.
[1]
???? ????? π
[
???
]
?????
???? ???? ?????
.
??? ??? ????? ???? ????? ?? ???? ??? ????? ??
π
. ?????? ???? ????? ??? ??????? ???? ????????
???????
???? ????? ??? ????? ?????? ???? ????? ?????
π
.
?? ??? 1596? ??? ??? ????? ????? ??????
Van den circkel
(??? ???????)? ??? ??? ????? ???? ??? ??????? ????? π? ????? ???? ????? ??????? ??????? ????? ????? ??? ????? ???? ?????????
???? ????? ??????
. ???? ????? ?????? ??? ????? ?? ??? 1424? ??? ??? ??? ??? ???? ??? ??????? ????? π.
??? ??? ???? ???? ?????????? ??? ??? 1603 ? 1620? ???? ??? ????? ?? ???? ???? ??? ?????? ??? 35 ???? ?????:
3.14159265358979323846264338327950288...,
? ??? ??? ??????? ?? ????? ?? ?????? ???? 30 ???.
???? ??? ????? ?? ?????? ??? ??? ????? ???????
????? ????? ?????
??? ????? ????? 2
62
????? ????? ????? ?????? ????? ????? ????? ??? ?????? 3 * 2
28
.
???? ???? ?
[
???
]
??? ?????? ????
??? ??????
3.14159265358979323846264338327950288...
(?? ????? π ?????? ???? ??????? ???? ??? ???????) ???
????
.
?? ???????? ????? ?? ??? ??????? ??? ????? π ????
??? ??????
.
?????
[
???
]
- ?? ?????? ??? ?? ???? ?? ??? ??????? ?? ?????? ?????????? ???????
.
De circulo & adscriptis liber
(1619)
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