Mathematics · Investing · Living systems
Learn math.
Grow your wealth.
Understand compounding, explore risk, and make more thoughtful decisions—with lessons from mathematics and biology.
I’m Zachariah Sinkala, a computational cancer biologist, author, and researcher. I make complex ideas easier to explore through articles, books, and practical tools.
Start with intuition. Build the mathematics as you go.
Start here
Choose your next step.
You do not need an advanced math background. Begin with a question that matters to you.
01 / Learn the basics
Make sense of investment returns
Build intuition for percentages, compounding, stocks, ETFs, and bonds.
Start with the basics →02 / Build a plan
Explore investing strategies
Learn how different approaches fit different goals and time horizons.
Explore strategies →03 / Protect your progress
Recognize investment scams
Learn to question promises and spot warning signs before committing money.
Read the guide →Interactive tools
Turn an idea into a scenario.
Use these tools to explore assumptions and possible outcomes. Calculations are learning aids, not forecasts.
Plan
Passive Income Calculator
Explore income scenarios and see how changing your inputs changes the result.
Open the calculator →Explore risk
Portfolio Immune System Analyzer
Explore portfolio resilience through a framework inspired by biological defense systems.
Open the analyzer →For developers
BioFlywheel API
Explore the API page for programmatic access to the portfolio analysis framework.
Explore the API →Another resource: Stoculator investment calculator.
Featured book / Zachariah Sinkala
The Mathematics
of the Living Body
Volume 1: Cardiovascular Physiology
Explore how mathematical models connect with the biology of the heart and circulation. Work through the principles, approximations, and limits behind the equations.
Also in the collection: Stoic Investing: Stability Under Market Stress, The Algorithm of Life, and Connected Health.
Watch & learn
Ideas you can build on.
Explore investing concepts, mathematical intuition, and the connections between biological and financial systems.
Income & compounding
Maximize Your Wealth with Passive Income
Explore reinvestment and compounding as part of a long-term income approach.
Watch on YouTube →Income strategies
Covered-Call ETFs vs Dividends
Compare two approaches to investment income and the trade-offs worth understanding.
Watch on YouTube →Explore more videos on mathematics, biology, and markets
- How Cancer Biologists Predict Drug Resistance — And What It Teaches Us About Markets
- Why Therapies Fail : The Math Behind Drug Resistance
- Adaptive Therapy: Why the Best Strategy Is Not Maximum Force
- The Math of Market Crashes: Spectral Graph Theory & Systemic Risk
- Advanced Mathematics for everyone
- Introduction video about me
- The Fiedler Value: One Number That Predicts Market Collapse
- The mathematics of Dormancy
Selected articles
Look beyond the headline.
Read at your own pace. Follow the ideas that spark your curiosity.
Systems thinking
Black swans, cancer, and uncertainty
Explore connections between unexpected events, complex systems, and biology.
Read the article →Portfolio foundations
Dave Ramsey’s 4-Fund Portfolio
Examine a familiar portfolio framework and the ideas behind its allocation.
Read the article →Financial technology
Understanding tokenization
Explore what blockchain-based ownership could mean for financial assets.
Read the article →Workbooks & trackers
Bring reflection into your routine.
Practical resources for recording habits, organizing information, and asking better questions.
Investing habits
Stoic Investing Workbook
Reflect on discipline, market stress, and your investing decisions.
View on Gumroad →Personal tracking
Math-Optimized Life Dashboard
Organize your health measurements and explore trends over time.
View on Gumroad →Food & habits
DASH Diet Math Planner
Record dietary habits and track progress toward your goals.
View on Gumroad →Lifestyle goals
Diabetes Prevention Tracker
Track activity and lifestyle goals in an organized record.
View on Gumroad →See each product page for current prices and details. Health trackers support recordkeeping; they do not diagnose or treat illness.
The BioFlywheel Letter
One equation. One living system.
Explore mathematical systems thinking across physiology, cancer biology, and finance. Subscribe for equations, worked examples, and resources to deepen your understanding.
Subscribe to the free newsletterCommon questions
A little clarity before you begin.
Do I need advanced mathematics?
No. Start with the introductory articles and calculators. The physiology book and some video lessons go deeper, so you can choose the level that suits you.
Can these tools predict investment returns?
No. They help you explore assumptions, scenarios, and risk. Actual outcomes can differ substantially, and investments can lose value.
Where can I find books and workbooks?
The books section links to my Amazon author page. Each workbook and tracker links to its own Gumroad product page.
How does biology connect to investing?
Both offer ways to think about interacting parts, feedback, adaptation, and uncertainty. Biological comparisons can help explain an idea; they do not prove how markets will behave.