The book by French mathematician Jacques Hadamard, The Psychology of Invention in the Mathematical Field. The book discusses the four stages of thought:
Preparation (conscious work setting up the problem and trying to solve it)
Incubation (no conscious work on the problem)
Illumination (the fruits of incubation where an insight is received) and finally
Verification (consciously testing and verifying the insight)
Gromov's Ergobrain Program for Universal learning program:
- Mischa Gromov, Great Circle of Mysteries: Mathematics, the World, the Mind, Springer (2018) doi:10.1007/978-3-319-53049-9 (see also the essay of the same name from 2015).
