Characteristics of Pi 2 type geomagnetic pulsations
Exploring the Raspberry Pi 2 with C++
Siebenstellige Werte der Funktionen $$ sin\frac{\pi }{2}x,\,\cos \frac{\pi }{2} $$ für x = 0 (0,001) 0,5
Probabilistically proving that zeta(2)=pi^2/6