关于不等式s（P_i－1）≥P_i

On the Inequality s (P_i-1)≥ P_i

给出ｓφ（ｎ）＝ｎ的另５个解和φｓ（ｍ）＝ｍ的１２个解以及ｓφ（ｎ）＝ｎ的更强的必要条件．着重证明当ｎ≤５时，ｓφ Ｐ_ｉ＝ｓ （Ｐ_ｉ－１）≥ Ｐ_ｉ并证明了若ｓφ（ｎ）≥ｎ，则 ＜ ， ＜ ．

This paper gives five further solutions of s(φ)n=n and twelve solutions ofφs(m)= m and stronger necessary condition for sφ(n)=n. It proves that and proves that if then