Zeckendorf's Theorem
The Sequence 
is Complete even if restricted to subsequences which containno two consecutive terms, where 
is a Fibonacci Number.
References
Brown, J. L. Jr. ``Zeckendorf's Theorem and Some Applications.'' Fib. Quart. 2, 163-168, 1964. Keller, T. J. ``Generalizations of Zeckendorf's Theorem.'' Fib. Quart. 10, 95-112, 1972. Lekkerkerker, C. G. ``Voorstelling van natuurlijke getallen door een som van Fibonacci.'' Simon Stevin 29, 190-195, 1951-52.
- Kruskal's Tree Theorem
- KS Entropy
- k-Statistic
- k-Subset
- k-Theory
- k-Tuple Conjecture
- Kuen Surface
- Kuhn-Tucker Theorem
- Kuiper Statistic
- Kulikowski's Theorem
- Kummer Group
- Kummer's Conjecture
- Kummer's Differential Equation
- Kummer's Formulas
- Kummer's Function
- Kummer's Quadratic Transformation
- Kummer's Relation
- Kummer's Series
- Kummer's Series Transformation
- Kummer's Test
- Kummer's Theorem
- Kummer Surface
- Kuratowski Reduction Theorem
- Kuratowski's Closure-Component Problem
- Kuratowski's Theorem