# Category:Pages with Questionable Content

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These are pages containing proofs that are of questionable validity.

See the questionable template.

## Pages in category "Pages with Questionable Content"

The following 93 pages are in this category, out of 93 total.

### A

### B

### C

- Cantor-Bernstein-Schröder Theorem/Proof 4
- Cardano's Formula/Examples/x^3 - 15x - 4
- Centralizer of Self-Inverse Element of Non-Abelian Finite Simple Group is not That Group
- Characterization of Lower Semicontinuity
- Definition:Class (Class Theory)
- Class Member of Class Builder
- Definition:Class/Zermelo-Fraenkel
- Definition:Coefficient of Polynomial
- Conditions for Internal Group Direct Product
- Conjunction with Tautology/Proof 1
- Construction of Outer Measure
- Continued Fraction Algorithm
- Continued Fraction Algorithm/Proof 1
- Continuous Functions on Compact Space form Banach Space
- Convergents are Best Approximations
- Conversion of Number in Golden Mean Number System to Simplest Form

### D

- Definition:Degree of Polynomial
- Definition:Degree of Polynomial/Ring
- Derivative of Hyperbolic Sine/Proof 3
- Diagonal Relation is Universally Compatible
- Definition:Differentiable Mapping/Real-Valued Function/Point/Definition 1
- Definition:Differentiable Mapping/Real-Valued Function/Point/Definition 2
- Disjunction with Tautology
- Disjunction with Tautology/Proof 1

### E

### F

### I

### L

- Definition:Leading Coefficient of Polynomial
- Lebesgue Integral is Extension of Darboux Integral
- Limit at Infinity of Polynomial over Complex Exponential
- Definition:Limit Point/Topology/Set
- Definition:Limit Point/Topology/Set/Definition 5
- Logarithm of Infinite Product of Complex Functions/Corollary
- Logarithmic Derivative of Infinite Product of Analytic Functions
- Logical Consequence with Union

### O

### P

- Pair is Union of Singletons
- Power of 2 is Difference between Two Powers
- Prime Enumeration Function is Primitive Recursive
- Prime Number Theorem
- Definition:Primitive Recursion/One Variable
- Principle of Finite Induction
- Principle of Finite Induction/Proof 2
- Product of Two Distinct Primes has 4 Positive Divisors
- Proper Subset of Finite Ordinal is Equivalent to Smaller Ordinal

### S

- Set Equivalence is Equivalence Relation
- Set of all Sets
- Set of Gödel Numbers of Arithmetic Theorems Not Definable in Arithmetic
- Size of Tree is One Less than Order
- Size of Tree is One Less than Order/Necessary Condition
- Solution to Legendre's Differential Equation
- Definition:Spanning Subgraph
- Square of Vandermonde Matrix
- Sufficient Condition for Vector Equals Inverse iff Zero
- Surjection Induced by Powerset is Induced by Surjection