Mathlean · Online math workspace
Quantified logic calculator
Evaluate supported quantified statements over explicit finite domains.
How to use this calculator
Edit ForAll(x in {1,2,3},x>0). Use Exists or ExistsUnique for existential tests.
Tap the math below to edit it and see the result. Once a result is ready, press Tab on a hardware keyboard to accept it. Outside a matrix, Return completes the line; the phone math keyboard has the same Return action.
Try it here
Interactive tools require JavaScript. You can read the guide and example without it.
What to know
This demonstrates a finite-domain calculation, not a general theorem prover over arbitrary infinite domains.
Mathlean combines visual mathematical input with computation and canvas tools. Results depend on the expression and available engine support; check important answers independently.