Elysia Tools: Tools, Visualizations, and Samples in One Place

Factorial Calculator

Calculate n! for a non-negative integer with exact BigInt output, optional steps, and related values such as trailing zeros

Math, Date & Finance

Permutation Calculator

Calculate permutations with or without repetition, plus circular arrangements, with formulas and optional steps

Math, Date & Finance

Sequence Calculator

Calculate arithmetic, geometric, and Fibonacci sequences, including the nth term, the first terms, and the partial sum

Math, Date & Finance

Divisibility Calculator

Check whether one integer is divisible by another and show the quotient, remainder, and optional divisibility hint

Math, Date & Finance

Modulo Calculator

Compute the remainder of integer division, with optional normalization to the positive modulo form

Math, Date & Finance

Natural Log Calculator

Calculate natural logarithms ln(x), with optional comparisons to log10 and the matching exponential form

Math, Date & Finance

Prime Factorization Calculator

Break an integer into prime factors, show the factorization string, and optionally include divisor properties and factorization steps

Math, Date & Finance

Antilog Calculator

Calculate antilogarithms for any valid base and optionally verify the result by applying the logarithm again

Math, Date & Finance

Spatial Rock-Paper-Scissors

Cyclic dominance on a spatial lattice producing self-organizing spiral waves

Z-Transform Visualizer

Interactive Pole-Zero Analysis on the Complex Z-Plane

Multi-Source Wave Interference

Explore how multiple coherent sources create interference patterns from double-slit to diffraction grating

Spectrogram Analyzer

Short-Time Fourier Transform Time-Frequency Analysis

Structural Holes - Social Network Brokerage

Your advantage comes not from how many people you know, but from how non-redundant they are

Schelling Segregation Model

How mild individual preferences produce extreme collective segregation

FIR/IIR Filter Frequency Response

H(e^jw) Magnitude-Phase Response & Pole-Zero Plot

Lorenz Curve & Gini Coefficient

Interactive visualization tool for income and wealth inequality analysis

Time Zone Workflow Scheduler ICS Samples

ICS files generated in the same structure returned by the Time Zone Workflow Scheduler, with multiple VEVENT meeting candidates exported from overlap windows

3 samples

Terraform Plan JSON Samples

Sample Terraform plan JSON files exported from terraform show -json style payloads for dependency visualization and change review

3 samples

ICS Calendar Samples

Sample iCalendar (.ics) files for testing calendar import, event parsing, reminders, and recurring schedules

3 samples

PCAP Capture Samples

Downloadable PCAP capture files from simple to complex for protocol inspection, parser testing, and packet-analysis demos

3 samples

PCAPNG Capture Samples

Downloadable PCAPNG capture files from simple to complex for parser validation, format comparison, and network-analysis walkthroughs

3 samples

Length Distance Samples

Educational length and distance reference samples covering metric and imperial units, everyday comparisons, and conversion literacy

3 samples

VTT Subtitle Samples

Sample WebVTT subtitle files from simple to complex for subtitle previews, parser testing, conversion, and note handling

3 samples

ASS Subtitle Samples

Sample ASS subtitle files from simple to complex for style-aware subtitle parsing, translation, conversion, and localization QA

3 samples