ethhash is the seed generated from history block headers or from predefiend seed

[barryWhiteHat]

I am not sure that point 1 https://eth.wiki/en/concepts/ethash/ethash in the intro is correct.

"There exists a seed which can be computed for each block by scanning through the block headers up until that point."

In the sudo code they seem to be just taking 0x0 and hashing that as the seed.

[barryWhiteHat]

I believe that appendix J of the white paper supports this. But it is contradicted by section "11.5.1.Ethash" :/

[barryWhiteHat]

I have confimed this in gitter core devs channel. This means we also need to change this point in the yellow paper.