Nede ilana
Kocopon is kare walvedeyafa preksa, nede ilana zo faver neken alkaf izvopik torigid da 1-e abdi Yesus Kristos tir walukiskon abdife gu 1-e ilana. Batdume :
 1-e abdi Yesus Kristos = nede
 2-e abdi Yesus Kristos = voltane
 3-e abdi Yesus Kristos = voltole
 ikz-

Nede ilana gan kocopik 
Nede ilana zo ganduyur bak 1740 gan Jacques Cassini kocopik ta inafa kocopafa wafra.
Numen, kocopon, nede ilana sotir tela waroldon abdifa gu taneafa ilana ke kristevaf firday.

Kevie kristevafa jara, kocopafa tela soguntar gu nendoyera va patavaraf nelkot cwade : rekola mali evla ke m ilana kali milkafa evla ke n ilana sojijar vas n-m tanda ( dace tode m<0 is n>0 ). Waluk wali 29/02/-4 is 29/02/4 acke sojijar vas anyustda solve, kare kristevafa jara a nede ilana, waluk wali 29 ke toleaksat ke 4-e abdi Yesus Kristos is 29/02/4 sojijar vas anton perda.