failed to synthesize instance

unknown identifier 'F'

unknown identifier 'F'

Declaration LinearMap.mem_ker not found.

typeclass instance problem is stuck, it is often due to metavariables

Declaration LinearMap.ker_id not found.

unknown identifier 'F'

unknown identifier 'mem_ker'

Declaration LinearMap.map_coe_ker not found.

typeclass instance problem is stuck, it is often due to metavariables

Node.js 16 actions are deprecated. Please update the following actions to use Node.js 20: actions/checkout@v3, liskin/gh-problem-matcher-wrap@v2. For more information see: https://github.blog/changelog/2023-09-22-github-actions-transitioning-from-node-16-to-node-20/.

declaration uses 'sorry'

declaration uses 'sorry'

try 'simp' instead of 'simpa' [linter.unnecessarySimpa]