Anatolia and Samarkand · c. 1364-1436
Qadi Zada al-Rumi
Qadi Zada al-Rumi was mathematician and astronomer. He taught and worked at the Samarkand observatory, contributing to trigonometric and astronomical calculation.
Biographical and historical reference works document Qadi Zada al-Rumi’s role and the mathematical work summarized on this page.
6-8, 9-12, College
The person and the work
Biography
Qadi Zada al-Rumi was mathematician and astronomer associated with Anatolia and Samarkand. He taught and worked at the Samarkand observatory, contributing to trigonometric and astronomical calculation.
His commentaries helped train the scholarly group that produced the Zij-i Sultani tables. Together, these contributions connect algebra and functions and trigonometry to the working problems, tools, and questions of the period.
Mathematical contribution
What this hero added or preserved
Core mathematical work
He taught and worked at the Samarkand observatory, contributing to trigonometric and astronomical calculation.
Method, teaching, or application
His commentaries helped train the scholarly group that produced the Zij-i Sultani tables.
Why this matters
The larger lesson
Qadi Zada al-Rumi shows that mathematics grows through proof, calculation, observation, design, teaching, or careful records. The lasting lesson is that algebra and functions and trigonometry can turn a difficult question into a method another person can inspect and reuse.
Place the work in time
Timeline
- c. 1364
Life and working period
Qadi Zada al-Rumi worked as mathematician and astronomer in Anatolia and Samarkand.
- Legacy
Lasting mathematical connection
His commentaries helped train the scholarly group that produced the Zij-i Sultani tables.
Key idea
An equation balances two descriptions
Qadi Zada al-Rumi’s work shows how symbols can represent an unknown quantity while preserving equality.
In 4x + 12 = 44, subtracting 12 and dividing by 4 gives x = 8.
Try it yourself
Solve the equation
Solve 4x + 12 = 44.
- Subtract 12 from both sides.
- Divide both sides by 4.
- Substitute the result to check.
Show the answer
x = 8.
Math at work
Navigators and pilots use the same habits
Navigators and pilots use algebra and functions to plan, compare, test, or communicate decisions. Qadi Zada al-Rumi’s work provides a historical example of that connection.
Keep curiosity alive
A little-known fact
His commentaries helped train the scholarly group that produced the Zij-i Sultani tables.
Qadi Zada al-Rumi matters because of only one famous formula or anecdote.
The documented record is broader: He taught and worked at the Samarkand observatory, contributing to trigonometric and astronomical calculation.
Keep exploring
Connected learning paths
Practice these ideas
- Pre-AlgebraBridge arithmetic and algebra with integers, ratios, and equations.
- Algebra IPractice equations, variables, functions, ratios, and inequalities.
- Algebra IIWork with quadratics, polynomials, systems, and sequences.
- TrigonometryUse angles, right triangles, radians, and trigonometric functions.