# Reports:Tasks not implemented in Mathematica

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## Contents

## Not implemented[edit]

These are currently not implemented in Mathematica. Please implement some if you can. If any tasks are not possible or too complex in Mathematica, they should not be on this list. To mark a task as such, add **{{omit from|Mathematica}}**, preserving the capitalization of the language, to that task. It will appear below under the "Not Considered" section.

### 2

### A

- AVL tree
- Abbreviations, automatic
- Abbreviations, easy
- Abbreviations, simple
- Abelian sandpile model
- Abundant odd numbers
- Angle difference between two bearings
- Angles (geometric), normalization and conversion
- Anti-primes
- Apply a digital filter (direct form II transposed)
- Approximate Equality
- Attractive numbers

### C

- CUSIP
- Cantor set
- Chaocipher
- Checkpoint synchronization
- Chinese zodiac
- Chowla numbers
- Church Numerals
- Colour pinstripe/Printer
- Commatizing numbers
- Compare sorting algorithms' performance
- Compiler/AST interpreter
- Compiler/code generator
- Compiler/lexical analyzer
- Compiler/syntax analyzer
- Compiler/virtual machine interpreter
- Convex hull
- Cuban primes
- Currency
- Cut a rectangle

### D

- De Bruijn sequences
- Deming's Funnel
- Determine if a string has all the same characters
- Determine if a string has all unique characters
- Dining philosophers
- Doubly-linked list/Definition
- Doubly-linked list/Element definition
- Doubly-linked list/Element insertion
- Doubly-linked list/Traversal
- Draw a pixel

### E

### F

- FTP
- Factorial base numbers indexing permutations of a collection
- Find the intersection of two lines
- First class environments
- First perfect square in base N with N unique digits
- Fixed length records
- Flipping bits game
- Floyd-Warshall algorithm
- Four is magic
- Four is the number of letters in the ...
- Functional coverage tree
- Fusc sequence

### H

### I

### K

### L

### M

### N

### P

- P-value correction
- Parametric polymorphism
- Parse an IP Address
- Parsing/RPN to infix conversion
- Pattern matching
- Peaceful chess queen armies
- Peano curve
- Pell's equation
- Penney's game
- Percolation/Bond percolation
- Percolation/Mean cluster density
- Percolation/Site percolation
- Perfect totient numbers
- Pig the dice game/Player
- Pinstripe/Printer
- Plasma effect
- Poker hand analyser
- Polyspiral
- Prime conspiracy
- Primes - allocate descendants to their ancestors
- Pythagoras tree
- Pythagorean quadruples

### R

### S

- S-Expressions
- Safe primes and unsafe primes
- Sailors, coconuts and a monkey problem
- Same Fringe
- Scope/Function names and labels
- Sequence: nth number with exactly n divisors
- Sequence: smallest number greater than previous term with exactly n divisors
- Sequence: smallest number with exactly n divisors
- Sequence of primes by trial division
- Sequence of primorial primes
- Sexy primes
- Shortest common supersequence
- Show Ascii table
- Simple database
- Simulate input/Keyboard
- Simulate input/Mouse
- Smarandache prime-digital sequence
- Sokoban
- Solve a Hidato puzzle
- Solve a Holy Knight's tour
- Solve a Hopido puzzle
- Solve a Numbrix puzzle
- Sort a list of object identifiers
- Sort numbers lexicographically
- Sorting algorithms/Patience sort
- Spelling of ordinal numbers
- Spinning rod animation/Text
- Square but not cube
- Stable marriage problem
- Stern-Brocot sequence
- Straddling checkerboard
- Stream Merge
- Strong and weak primes
- Subleq
- Successive prime differences
- Suffixation of decimal numbers
- Sum and Product Puzzle
- Sunflower fractal
- Superpermutation minimisation
- Synchronous concurrency

### T

### V

### Draft tasks without implementation[edit]

These tasks are drafts, meaning they largely need more work to turn them into full tasks. Perhaps you can help by trying to implement them in Mathematica (after all, one of the key requirements for a task being non-draft is multiple implementations, preferably in widely different languages) but be aware that this may be difficult because of lack of definition of the task itself.

### 2

### A

### B

### C

- Card shuffles
- Chebyshev coefficients
- Check input device is a terminal
- Check output device is a terminal
- Checksumcolor
- Chemical Calculator
- Chernick's Carmichael numbers
- Cheryl's Birthday
- Chess player
- Chess player/Move generation
- Chess player/Program options and user interface
- Chess player/Search and evaluation
- Cipolla's algorithm
- Color wheel
- Combinations with repetitions/Square Digit Chain
- Continued fraction/Arithmetic/G(matrix NG, Contined Fraction N)
- Continued fraction/Arithmetic/G(matrix NG, Contined Fraction N1, Contined Fraction N2)
- Copy stdin to stdout
- Curve that touches three points
- Cycle detection

### D

### E

### F

- Factorions
- Faulhaber's formula
- Faulhaber's triangle
- Feigenbaum constant calculation
- Fermat numbers
- Fibonacci heap
- File extension is in extensions list
- File size distribution
- Find URI in text
- Find the intersection of a line with a plane
- Finite state machine
- Fraction reduction
- Free polyominoes enumeration
- French Republican calendar

### G

### H

### I

### L

### M

- Magic 8-Ball
- Make a backup file
- Markov chain text generator
- Mayan calendar
- Mersenne primes
- Metallic ratios
- Modular arithmetic
- Monads/List monad
- Monads/Maybe monad
- Monads/Writer monad
- Montgomery reduction
- Morpion solitaire
- Most frequent k chars distance
- Multidimensional Newton-Raphson method
- Multiline shebang

### N

### O

### P

### R

- Railway circuit
- Ramanujan's constant
- Random Latin Squares
- Raster bars
- Read a file character by character/UTF8
- Readline interface
- Recursive descent parser generator
- Reflection/List methods
- Remote agent/Agent interface
- Remote agent/Agent logic
- Remote agent/Simulation
- Resistance Calculator
- Resistance Network Calculator
- Reverse the gender of a string
- Robots
- Rosetta Code/List authors of task descriptions
- Rosetta Code/Rank languages by number of users
- Rosetta Code/Run examples
- Rosetta Code/Tasks sorted by average lines of code
- Rosetta Code/Tasks without examples
- Run as a daemon or service

### S

- Safe mode
- Sattolo cycle
- Selective File Copy
- Self-hosting compiler
- Separate the house number from the street name
- Simulated annealing
- Sine wave
- Singly-linked list/Element removal
- Snake
- Snake And Ladder
- Solve a Rubik's Cube
- Solving coin problems
- Sorting Algorithms/Circle Sort
- Sorting algorithms/Cycle sort
- Sorting algorithms/Tree sort on a linked list
- Spoof game
- Starting a web browser
- Stirling numbers of the first kind
- Stirling numbers of the second kind
- Substitution Cipher
- Suffix tree
- Sum data type
- Super-d numbers

### T

- Tamagotchi emulator
- Teacup rim text
- Terminal control/Restricted width positional input/No wrapping
- Terminal control/Restricted width positional input/With wrapping
- Text between
- Text to HTML
- Time-based One-time Password Algorithm
- Topological sort/Extracted top item
- Transportation problem
- Tree datastructures
- Two Sum
- Type detection

### U

### W

## Requiring Attention[edit]

### Examples[edit]

These tasks have implementations in Mathematica, but somebody, somewhere, decided that the example implementation was faulty or in some other way requiring attention. If you're familiar with the task and language, please consider reviewing/correcting the example and removing the notice.

### Other pages[edit]

These are other pages related to Mathematica which require attention; with your knowledge and assistance, we can improve the quality of the site's content.

### No pages found.

## Not Considered[edit]

These tasks are not generally counted toward "unimplemented", as somebody, somewhere, decided that Mathematica was inappropriate for these tasks, or implementations of them would be unenlightening. Feel free to try your hand at them anyway.

### C

## End of List[edit]

Again, feel free to try your hand at any of the tasks listed on this page.