New posts in real-numbers

Supremum of an intersection of sets

real-numbers upper-lower-bounds

Could Euclid have proven that real number multiplication is commutative?

real-analysis geometry euclidean-geometry math-history real-numbers

Proving (without using complex numbers) that a real polynomial has a quadratic factor

abstract-algebra polynomials real-numbers alternative-proof

Is there a mathematical statement that is linking integer limits to real limits?

real-analysis limits elementary-number-theory real-numbers

The well ordering principle

set-theory real-numbers well-orders

For what $x$ is there some $k$ such that $x\uparrow\uparrow k$ is an integer?

Geometric interpretation of a quintic's roots as a pentagon?

geometry trigonometry roots real-numbers

negation of mathematical statements- Real Analysis example

real-analysis logic real-numbers

Is there a "one-line" proof of $x<y\Rightarrow x^n<y^n$ (for $n$ an odd natural number)?

real-analysis inequality real-numbers

Who first proved that the second-order theory of real numbers is categorical?

logic math-history foundations higher-order-logic real-numbers

For any unbounded set of real numbers, is there a subset which almost coincides with a uniformly spread out set of points an infinite amount of times?

real-analysis sequences-and-series problem-solving real-numbers pigeonhole-principle

Connected subsets of set

real-analysis real-numbers connectedness

If $A$ is dense in $\Bbb Q$, then it must be dense in $\Bbb R$.

real-analysis real-numbers

Pondering $f(x) = \alpha x$ for an irrational $\alpha$.

real-numbers rational-numbers slope

Dimension of R over Q without cardinality argument. [duplicate]

linear-algebra vector-spaces irrational-numbers real-numbers

When is an Integer a Rational Number, and are All Ratios Rational, Even $\frac{\sqrt{7}}{2}$?

irrational-numbers real-numbers rational-numbers

How can I mathematically split up a 3 digit number?

Factorize $a^5+a^4+a^3+a^2+a+1$

polynomials real-numbers factoring

Taking the square root of an imaginary number

complex-numbers exponentiation real-numbers

Clarification on Pauli matrices

linear-algebra matrices complex-numbers vector-spaces real-numbers