zurich provisional relative sunspot number
1ZPRSN — Zurich Provisional Relative Sunspot Number Astronomy …
2ZPRSN — Zurich Provisional Relative Sunspot Number {Astronomy} …
3Mathematics and Physical Sciences — ▪ 2003 Introduction Mathematics Mathematics in 2002 was marked by two discoveries in number theory. The first may have practical implications; the second satisfied a 150 year old curiosity. Computer scientist Manindra Agrawal of the… …