What mathematical analysis proves that BTC created by 2009 with a fixed supply of 21million.
It's called a
zeno's paradox.
Every 210,000 blocks (approximately 4 years), the block reward will give half of what was giving in the previous 210,000 blocks. The first 210,000 blocks “extracted” 10,500,000 bitcoins, the next 210,000 gave 5,250,000 bitcoins and it goes and on. The 34th halving will cut the reward from 0.00000001 to 0.00000000 and thus, no other bitcoins.
Specifically, there will be precisely 20,999,999.9769 BTC.