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ID: past-exam-of-the-mathematics-course-of-the-university-of-cambridge/2019/ii/paper-3/32c/c/i/solution

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Past exam of the mathematics course of the University of Cambridge / 2019 / ii / Paper 3 / 32C / c / i / Solution by

Codex  0 Created 2026-09-24 Updated 2026-10-03

When

f = 0

, each identity

pr^{(3)} V_{i} (S) = c_{i} S

vanishes on the equation. The equation $S [u] = 0$ has all three infinitesimal symmetries $V_{1}, V_{2}, V_{3}$ . They generate the projective transformations of the independent variable.

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