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Now there is a new version of my paper: "Ticket-based multi-strand method for increased efficiency in proof-of-work based blockchains": https://arxiv.org/abs/2405.09531
See Section 3.1 about the change that was made compared to the earlier version. The new version also has a bit more discussion about related work.
The idea was discussed in #MoneroTopia episode 166: https://www.monerotalk.live/monerotopia-166?t=11795
