nLab
Triggers: !nlab, !ncatlab
Try it
Kagi would openhttps://ncatlab.org/nlab/search?query=riemann+hypothesis
Run @nlab in Kagi for Kagi's own results from ncatlab.org only
URL pattern: https://ncatlab.org/nlab/search?query=query
Searches ncatlab.org, filed under Academic (math/cs).