Alphabeta Math

The Logarithm and General Powers

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✓ 21 results · all verified · 1 also independently AI-judged
Every result on this page is machine-checked by a proof checker and read in full and owner-audited; the judge is an additional, independent cross-model AI review of the proofs. The 20 not AI-judged were verified by owner audit (typically over a confirmed judge false positive), not failures.
1 · Prerequisites
2 · Logical flowchart

3 · Items

Definition

The natural logarithm as the inverse of the exponential function

Theorem

Order, continuity, range, and the product, quotient, and reciprocal laws for the natural logarithm

Theorem

The natural logarithm has derivative 1/x and equals the integral from 1 to x of 1/t

Theorem

The Euler–Mascheroni constant and the harmonic asymptotic

Definition

Real powers for positive bases, with the zero-base positive-exponent convention

Theorem

The exponential definition of real powers agrees with the existing rational powers

Theorem

The exponent, product, quotient, and iterated-power laws for positive real bases and real exponents

Theorem

Continuity and derivatives of positive-base real powers

Definition

The logarithm to a positive base other than one

Theorem

Change of base and inversion of the positive-base real exponential

Definition

Real powers from suprema of rational powers, with the reciprocal convention below base one

Theorem

The rational-supremum construction of real powers agrees with the exponential construction

Corollary

Every rational approximation to a real exponent gives the same limiting real power

Theorem

Landau's root limit: log x is the limit of 2ⁿ times (x^(1/2ⁿ) minus 1)

Theorem

The power series for log(1+x) on (-1,1], including the Abel endpoint

Theorem

Under square summability, the signed product of (1+pₙ) converges iff the series of pₙ converges

Theorem

The logarithm grows more slowly than every positive real power

Theorem

The p-series for a real exponent p converges exactly when p is greater than one

Theorem

The two-point convexity inequality for the exponential function

Theorem

The weighted arithmetic-geometric mean inequality for real weights

Theorem

Young's inequality for conjugate real exponents

Theorem

Holder's inequality for finite sums and conjugate real exponents

Theorem

Minkowski's inequality for finite sums and real exponent p greater than one

Definition

The six hyperbolic functions and their natural domains

Theorem

Addition formulas, identities, parity, and derivatives of the hyperbolic functions

Theorem

Logarithm formulas for inverse sinh, inverse cosh, and inverse tanh on their natural domains

Sources