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Technical Notes

Technical Notes

Feb 02, 2026

  • 001 ; ODEs ; Picard Iteration ; Cauchy-Lipschitz
  • 002 ; ODEs ; Maximal Interval of Existence
  • 003 ; DSA ; Overlap Detection with Sweep Line Algorithm
  • 004 ; DSA ; Linear-time RBT Construction from Sorted List
  • 005 ; DSA ; Upper Bounds on Red Nodes in a Red-Black tree
  • 006 ; LinAlg ; Non-invertibility of 2x2 Matrix Pencils
  • 007 ; DSA ; Non-lazy Deletion in Tournament Trees.
  • 008 ; LinAlg ; Diagonalizability of the Transpose Map across Field Characteristics
  • 009 ; LinAlg ; Invariance of Characteristic Polynomials Under Conjugation
  • 010 ; LinAlg ; Eigenvalues of Polynomials
  • 011 ; LinAlg ; Invariance of Eigenspaces Under Transposition
  • 012 ; Analysis ; Fixed Points on Compact Spaces
  • 013 ; Analysis ; Geometric Series with Matrix Norm
  • 014 ; Analysis ; Cauchy Sequences and Functions on the Closure
  • 015 ; LinAlg ; Invertibility of the Linear Functionals of a Dual Basis
  • 016 ; LinAlg ; Diagonalizability of Reflection
  • 017 ; ODEs ; Homogenous First-Order Linear Systems
  • 018 ; ODEs ; Homogenous Defective First-order Linear System
  • 019 ; ODEs ; Solving Non-exact Differential Equations
  • 020 ; ODEs ; Solving First-order Linear Equations
  • 021 ; DSA ; Designing Deque for O(1) Amortized Time
  • 022 ; DSA ; Proving Optimality and Designing Huffman Encoding Algorithm
  • 023 ; Analysis ; Completeness of Normed Vector Spaces via Absolutely Converging Series
  • 024 ; Analysis ; Cauchy Condensation Test and Generalized Bertrand Series
  • 025 ; Analysis ; Bertrand’s Convergence Test and Telescoping Series Bounds
  • 026 ; Analysis ; Hölder’s Inequality for Sequence Spaces and Absolute Convergence
  • 027 ; Analysis ; Summation by Parts and Abel’s Theorem for Power Series
  • 028 ; Analysis ; Domain Additivity of Riemann-Stieltjes Integrals
  • 029 ; Analysis ; Riemann-Stieltjes Integration Against Step Functions
  • 030 ; Analysis ; Reduction of Riemann-Stieltjes Integrals to Riemann Integrals
  • 031 ; Analysis ; Evaluation of Riemann-Stieltjes Integrals with Infinite Jump Discontinuities
  • 032 ; Analysis ; Hölder’s Inequality for Riemann-Stieltjes Integrals
  • 033 ; Analysis ; Proving Convexity of Functions Using Taylor’s Theorem
  • 034 ; Analysis ; Binomial Series Convergence via Taylor’s Integral Remainder
  • 035 ; Analysis ; Integral Comparison Test for the Bertrand Series
  • 036 ; Analysis ; Integral Representations of the Riemann Zeta Function
  • 037 ; LinAlg ; Basis and Polynomials of a Cyclic Subspace
  • 038 ; LinAlg ; T-Invariant Subspaces and Cayley-Hamilton Theorem via Cyclic Subspaces
  • 039 ; LinAlg ; Simultaneous Diagonalization of Commuting Linear Transformations
  • 040 ; LinAlg ; Minimal Polynomial of Invertible Linear Transformations and Inverses
  • 041 ; LinAlg ; Diagonalizability of the Transpose Map across Field Characteristics
  • 042 ; LinAlg ; Jordan Canonical Form of the Transpose Map over Finite Fields
  • 043 ; LinAlg ; Enumerating Conjugacy Classes via Splitting Characteristic Polynomials
  • 044 ; LinAlg ; Computing the Jordan Canonical Form and Modal Matrix of a 4x4 Matrix
  • 045 ; LinAlg ; Frobenius Inner Product on Matrix Spaces
  • 046 ; LinAlg ; Parallelogram Law and Polarization Identity
  • 047 ; LinAlg ; Orthogonal Projection Operators via Orthonormal Bases
  • 048 ; LinAlg ; Best Approximation Theorem for Orthogonal Projections
  • 049 ; LinAlg ; Riesz Representation Theorem and Dual Space Isomorphisms
  • 050 ; LinAlg ; Computing Riesz Representatives on Polynomial Spaces
  • 051 ; LinAlg ; Algebraic Properties of Adjoint Operators
  • 052 ; LinAlg ; Self-Adjoint Operators and Characterization of Isometries