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Update specs/core/0_beacon-chain.md 

Co-Authored-By: vbuterin <v@buterin.com>
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Hsiao-Wei Wang 2018-12-29 13:47:10 -06:00 committed by GitHub
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specs/core/0_beacon-chain.md
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@ -168,7 +168,7 @@ Unless otherwise indicated, code appearing in `this style` is to be interpreted
| `MAX_CASPER_VOTES` | `2**10` (= 1,024) | votes |
| `LATEST_BLOCK_ROOTS_LENGTH` | `2**13` (= 8,192) | block roots |
| `LATEST_RANDAO_MIXES_LENGTH` | `2**13` (= 8,192) | randao mixes |
| `LATEST_PENALIZED_EXIT_LENGTH` | `2**13` (= 8,192) | cycles | ~36 days |
| `LATEST_PENALIZED_EXIT_LENGTH` | `2**13` (= 8,192) | epochs | ~36 days |
| `EMPTY_SIGNATURE` | `[bytes48(0), bytes48(0)]` | - |
* For the safety of crosslinks `TARGET_COMMITTEE_SIZE` exceeds [the recommended minimum committee size of 111](https://vitalik.ca/files/Ithaca201807_Sharding.pdf); with sufficient active validators (at least `EPOCH_LENGTH * TARGET_COMMITTEE_SIZE`), the shuffling algorithm ensures committee sizes at least `TARGET_COMMITTEE_SIZE`. (Unbiasable randomness with a Verifiable Delay Function (VDF) will improve committee robustness and lower the safe minimum committee size.)