Essays

(2^67)-1 1729 235 Problem 2^64 3n + 1 Problem 4 Queens Problem 5-Smooth Number 8 Queens Problem 88 Hats 9 Queens Problem 99 Bottles of Beer A Fine Line Absolute and Relative Tolerance Ackermann's Function Advent Of Code AllPartitions Anagram AnimalsGame APL Acknowledgements APL Chronology APL Origins APL RNG APL's Birthday APL\360 Developers Photo Aspects of J Atoms Attribute-Value Processing Base Spectrum Bernoulli Numbers Bernstein Polynomials Beta Function Bibliography Bifactorial Binary GCD Algorithm Binary Probability Binary Tree Birthday Problem Bisection Method Bitwise Functions on Characters Block Matrix Inverse Boggle Boolean Array Size Boxed Array Display Brevity Capped Fork Cayley's Theorem Check Sums ChessboardPuzzle Chi-Squared CDF Chinese Remainder Theorem Cholesky Decomposition Christoffel Expressions Chudnovsky Algorithm Clockwise Angles Collatz Conjecture Combination Index Combination Sums Combinations Complete Tensor Complex Operations Compositions Continued Fractions Convex Hull Convolution Covert Representation Cross Product Cross Sums Data Structures	Dendrite Determinant DiceGame Distributed Apply Divisors Do While Double Factorial Duality Egyptian Fraction Eigenvalues English Grammar Error Function Euclidean Algorithm Euler's Formula Euler's Identity Extended H Extended Precision Functions Extremal Arguments Factorings FFT Fibonacci Index Fibonacci Sequence Fibonacci Sums Floyd From APL to J Game of Life Gauss-Bonnet Theorem Gaussian Integers Generalized Monty Hall Goldbach Conjecture Grading versus Sorting Gray Code Hailstone Sequence Hamming Number Hidden Line Removal Hilbert Matrix Histogram Hook Conjunction? Hook Rank Huffman Coding Identity Matrix IEEE Floating-Point Numbers In-Place Operations Incunabulum Indeterminate Index in Nub Inner Products Insanity Cube Insert Integer Knapsack Problem Integer Root Inverse Permutation Inverted Table Is a Scalar an Array? Isometric Surfaces J for C Programmers Front Cover J Tweets JKT Benchmark Josephus Problem Kadane Algorithm; J Tutorial Kakuro カックロ KenKen 賢賢 Key Knight's Tour Kronecker Product Kruskal's Algorithm Krypto Landau's Function	Large Exponent Real Arithmetic Levenshtein Distance Linear Congruential Generator Linear Recurrences Linear Regression Longest Common Subsequence Longest Increasing Subsequence Lorenz Attractor LU Decomposition Mastermind Matrix Inverse Matrix Powers Memo Mertens Function Middle Names Miller-Rabin Primality Test Minimal Spanning Tree Minors moo MSLDE MultipleOr Multiplicative Order Möbius Function N Queens Problem Name Resolution NaN Nearer Larger Neighbor Negative Rank Newton's Method Next Binary String Non-Adjacent Form (NAF) Non-Overlapping Substrings Nonincreasing Odometer Normal CDF Notation as a Tool of Thought Number in Words Nurikabe ぬりかべ Odometer Order Statistics Parentheses Matching Partitions Pascal's Ladder Pascal's Triangle Permutation Index Permutation Inverse Permutations Pi Piano Tuning Polyminoes Polynomial Multiplication Polynomials Intersection Popcount Power Set Primality Tests Prime APVs Primes Less Than n Progressive Index-Of Propagating Minimum QR Decomposition Queens and Knights Quicksort Rank Table Rank Recursive Descent Parser Reflexive Regex Lexer Regular Number Repeated Squaring	RNG Roll on BIGINTs Roman Numerals RSA Challenge Rössler Attractor Scalars Schwarzschild Scope Self-Downgrading Permutations Self-Upgrading Permutations Self-Valued Expression Semiprimes Set Game Set Partitions Short Circuit Boolean Simplex Method Sine Sort Times Sorting versus Grading SpaceTime2D Square Root Squeamish Ossifrage Stirling Numbers Stirling's Approximation Substring Replacement Sudoku 數独 Sum of a Bit Array Sum of a Vector Symbol-Minded Symmetric Array Symmetries of the Square Syracuse Problem t-Distribution CDF Tacit Expressions Taxicab Number Teaching J Syntax Tensor Experiments Text Formatting The Art of Shaving The Ball Clock Problem The Essentials of J The Monty Hall Problem The TAO of J Timestamp Extension Tolerant Comparison Torsion Tensor Totient Function Tower of Hanoi Trains Transpose Tree Display Tree Sum Triangular Data Triangular Matrix Inverse Tuning a Piano Un-puzzling expressions Under Unforgettable Numbers Unicode Histogram Unique Factors Unit Fraction Sum Vier Neun Warnsdorff's Algorithm Word Formation on Lines Zeckendorf Representation