# Marc

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 3 Help understanding a counting and probability exercise 3 Cubic with repeated roots has a linear factor 2 Definition of ordinary differential equation 2 Proving that the forgetful functor $U:\mathbf{Ring}\to\mathbf{Set}$ is representable. 2 Prove that finite sets are closed

# 475 Reputation

 +10 Simplify $w=\frac{(1+i)z-i+1}{iz-1}$ +10 Is 0.9 repeating = 1 disproved by asymptotes? +10 Definition of ordinary differential equation +15 Maximal Domain for the following functions

# 1 Question

 0 Simple enumeration of discrete simplex

# 32 Tags

 4 complex-analysis × 3 3 discrete-mathematics × 2 4 galois-theory × 2 3 abstract-algebra 4 probability × 2 3 polynomials 3 combinatorics × 2 3 self-learning 3 differential-equations × 2 2 real-analysis × 3

# 5 Accounts

 Mathematics 475 rep 15 Area 51 151 rep Stack Overflow 121 rep 1 Cross Validated 101 rep Theoretical Computer Science 101 rep