Infitite loop

[blevantovych]

Step to reproduce:

1. Open ui (localhost:8080)
2. choose Мінімакс (дискретна функція) option in menu
3. Degree = 2
4. 0, 0
   0.1, 0.050
   0.2, 0.250
   0.3, 0.550
   0.4, 0.725
   0.5, 0.950
   0.6, 1.175
   0.7, 1.550
   0.8, 1.950
   0.9, 2.500
   1.0, 3.250
   1.1, 4.375
   1.2, 6.125
   1.3, 9.375
   1.4, 15.875
   1.5, 20.500
5. fix 0 and 1.5 points and click Calculate

Actual behaviour: Infinite loop