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Blockchain Complete Guide  

Segregated Witness

SegWit is a software designed to primarily solve transaction malleability but will also improve capped block size issue. It will be incorporated in Bitcoin hard fork. It will increase the block size to 4 MB, meaning a single block can hold over 8000 transactions.

With this solution, we will have witness data segregated from block data.
Mathematical value

Sharding and Plasma are some of the other solutions to Scalability.