Mathematic concept, mathematic problems, or solve mathematic in past epoch that still to use/ not to use in present epoch or opposite its.
1. I found mathematic concept, mathematic problems or solution of mathematic in past epoch and now is ready to use, such as :
a. Zero number of concept, that founded in past epoch in
b. Pythagoras theorems ( elbow ) have side 3-4-5 as sacred triangle.
c. Square wide ; K = ( a+c)(b+d)/4 with side rapidly a, b, c, and d.
Volume from pyramid that found by
d. Limit function that famous with rule” L’ Hospital ”.
e. Algebra system in
2. I found mathematic concept, problems or solution of mathematic in past epoch and now is not to use, such as :
a. Circle wide = ( 8/9 x 2r ) 2
= 64/81 x r2
= 256/81 x r2
= 3,16 r2
So, at the time,
b. In Rhind Papyrus is about algebra and geometry. Then times with use two columns.
3. I found mathematic concept , mathematic problems or solution of mathematic in present that haven’t relation with mathematic in past epoch, such as :
a. Topologi is geometry branch and found in 20 century by Prances mathematician ( Jules Henry ). Topologi is mathematic about continuities.
b. Solve mathematic with use close problems, open-ended problems, open problems.