Formula 2

b e g i n a r r a y l 1 . m a t h r m D e s i g n m a t h r m r a t i o m a t h r m a c a u s a d i m a t h r m f o r z a n o r m a l e m a t h r m n = f r a c {m a t h r m N}_{} m a t h r m E d {m a t h r m N}_{m a t h r m p l, m a t h r m R d}

2 . m a t h r m S e z i o n e t r a s v e r s a l e m a t h r m p a r a m e t r o m a t h r m a l p h a = f r a c m a t h r m A - 2 c d o t m a t h r m b c d o t {m a t h r m t}_{} m a t h r m f m a t h r m A l e q 0.5 e n d a r r a y

;