Anyone who studies the Philosophy of Mathematics and Logic learns that proofs in these subjects only prove other things in these subjects. So for example, you can use mathematics to prove negative numbers exist (in mathematics). You can't use mathematics to prove that anything outside mathematics exists. For example, you can't use mathematics to prove that apples exist. However, because some branches of mathematics can be used to model the world in some way, they CAN be used to PREDICT something in the world. So, for example, Maxwell's equations seem to predict Radio waves. Prediction is not proof, however. The "proof" came with scientific experiments that "confirmed" the prediction. To prove that God exists requires a scientific experiment, not a mathematical or logical "proof". If you can think of a scientific proof of God, get ready to receive that Nobel prize.