Not correct, the root chain, which gets 50% of the hash power needs to be attacked. So for a 50% attack on the root chain you always need 25% hash power no matter how many shards are active.
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Not correct, the root chain, which gets 50% of the hash power needs to be attacked. So for a 50% attack on the root chain you always need 25% hash power no matter how many shards are active.
I agree with you.
Exactly, question is not related just to some n-shards. It is related to Quarckchain which is 50/50 in two chains.