> For the complete documentation index, see [llms.txt](https://zayn-network.gitbook.io/overview/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://zayn-network.gitbook.io/overview/research-areas.md).

# Research Areas

- [ZK Roll up on Bitcoin](https://zayn-network.gitbook.io/overview/research-areas/zk-roll-up-on-bitcoin.md)
- [Merged Mining](https://zayn-network.gitbook.io/overview/research-areas/zk-roll-up-on-bitcoin/merged-mining.md)
- [PoS / Economic Security](https://zayn-network.gitbook.io/overview/research-areas/zk-roll-up-on-bitcoin/pos-economic-security.md)
- [ZK Rollups](https://zayn-network.gitbook.io/overview/research-areas/zk-roll-up-on-bitcoin/zk-rollups.md)
- [Sovereign Rollups](https://zayn-network.gitbook.io/overview/research-areas/zk-roll-up-on-bitcoin/sovereign-rollups.md)
- [Trustless Bridging](https://zayn-network.gitbook.io/overview/research-areas/trustless-bridging.md): Zayn is researching & building various bridging solutions that are trustless or trust-minimized for greater liquidity flows in and out of the Zayn Network.
- [Over-collateralized zBTC](https://zayn-network.gitbook.io/overview/research-areas/trustless-bridging/over-collateralized-zbtc.md)
- [Federated Bridging](https://zayn-network.gitbook.io/overview/research-areas/trustless-bridging/federated-bridging.md)
- [Economic Security](https://zayn-network.gitbook.io/overview/research-areas/trustless-bridging/economic-security.md)