CRYPTO NEWS

Tourists flock to El Salvador despite Bitcoin bear market

El Salvador, the first country to adopt Bitcoin as legal tender, has seen explosive growth in tourism numbers in the first half of 2022.

Ethereum yellow paper is-sibling property

I’m reading the yellow paper and having some problems understanding equation 169 from here – also below: s(U,H) = (P(H) = P(U) ∧ H != U ∧ U !∈ B(H)_U) I can understand the first two conditions: The parent of the block associated with header H must correspond to the parent of the block corresponding::Listen

I’m reading the yellow paper and having some problems understanding equation 169 from here – also below:

s(U,H) = (P(H) = P(U) ∧ H != U ∧ U !∈ B(H)_U) 

I can understand the first two conditions:

  1. The parent of the block associated with header H must correspond to the parent of the block corresponding to header U. In other words, they must have the same parent.
  2. The blocks must be distinct

However, I cannot understand why 3 is needed. If the parent of U must correspond to the parent of H (i.e. they have the same parent) then how can U be a part of the ommer list of block H? Blocks can only be part of the ommer list of another block (as far as I understand it) if (at the very least) they are siblings with the parent of said block. So, given our initial condition that the parent of U must correspond to the parent of H, why do we need to additionally state that U cannot be part of the ommer list of H.

Tourists flock to El Salvador despite Bitcoin bear market

Shopping cart
There are no products in the cart!
Continue shopping
0