Tags abstract algebra1 DFS1 eulerian circuit1 eulerian path1 Fourier series1 graph2 hierholzer's algorithm1 homomorphism1 intuition1 isomorphism theorem1 kernel1 least-squares approximation1 linear transformation1 mean convergence1 orthonormal functions1 quotient group1 SCC1 strongly connected components1 tarjan's algorithm1 trail1 undergraduate1 vector spaces1