How statement and proof provenance work
The first chip identifies the source of the statement or construction; the second identifies the source of its local proof or verification.
- Literature-sourced: the exact statement appears in a cited source; only wording and notation differ.
- AI-adapted: a semantically identical restatement of literature-sourced material, modulo indexing, notation, and boundary cases adopted by the library.
- AI-generated: a genuinely novel statement formulated by AI, with no source for the claim itself.
These labels describe origin, not correctness: citations and verification chips remain separate evidence.
The exponential tends to at and to at
Statement
and the range of is contained in and is unbounded above with infimum .
Facts & Assumptions
Given: The exponential series.
For , every exponential-series term is nonnegative, so its sum dominates every partial sum and in particular (The real exponential function and the number by a power series, A series of nonnegative terms converges iff its partial sums are bounded, and then the sum is their supremum).
Finite and infinite limits of functions at infinity have the quantified definitions in Limits at and , and infinite limits at a point.
Proof
Given a real , every satisfies . Hence .
Given , choose with . If , then , so [L1] gives ; [L2] yields .
The range assertions follow from positivity and the two limit conclusions.
Depends on
- The real exponential function and the number $e$ by a power series
- A series of nonnegative terms converges iff its partial sums are bounded, and then the sum is their supremum
- The exponential is positive and satisfies $\exp(-x)=1/\exp(x)$
- Limits at $+\infty$ and $-\infty$, and infinite limits at a point
Used by
- Finite truncated tanh–sinh, exp–sinh, and sinh–sinh trapezoid rules Algorithm
- The exponential is a continuous bijection from ℝ onto (0,∞) Corollary
- A complete manifold with zero global injectivity radius Counterexample
- Differentiation under an improper integral can fail without uniform domination Counterexample
- Knapp rules out extension below the Tomas exponent Counterexample
- Misfit evidence and the potential posterior law Definition
- Quasisymmetric homeomorphisms of the line and circle Definition
- Backward Euler and BDF2 damp a fast scalar mode while trapezoidal does not Example
- Complex sine is unbounded on the imaginary axis Example
- Exponential singular decay, logarithmic balls, and spectral gaps Example
- Exponential singular-value decay and an exponentially weighted truth class Example
- Polynomial singular-value decay and a power Gaussian prior Example
- Power maps, endpoint distortion, and a non-Möbius quasisymmetric circle map Example
- The Gaussian integral on the line with a certified sinh-sinh truncation tail Example
- The positive-type Gaussian on the real line and its cyclic model Example
- A deterministic-prefix envelope sum for the sharper UCB count bound Lemma
- A double-exponential envelope bounds the omitted trapezoid tails Lemma
- A sufficiently high power regularizes finite logarithmic endpoint factors Lemma
- Fresnel whole-line moment from the damped complex Gaussian Lemma
- Maximum principle on a closed strip for bounded holomorphic functions Lemma
- Stirling's factorial asymptotic holds up to a positive constant Lemma
- The finite Rényi generators are convex with stated boundary values Lemma
- The improper integral of a power at zero Lemma
- The plane Gaussian integral equals π by polar coordinates Lemma
- Addition formulas, identities, parity, and derivatives of the hyperbolic functions Theorem
- An analytic-strip error bound for the infinite trapezoid sum Theorem
- An entire function of polynomial growth is a polynomial Theorem
- Complex sine and cosine are unbounded on the complex plane Theorem
- Empirical-Bernstein confidence sequence under adaptive sampling Theorem
- Equal-spherical mixture assignments and objective converge to k-means Theorem
- Existence of a Dirichlet process by normalized gamma Poisson random measure Theorem
- Exponential and Weibull survival specifications define probability laws Theorem
- Interior finite-temperature stationarity gives Fermi-Dirac occupations Theorem
- Knapp necessary condition for spherical L2 restriction Theorem
- The double-exponential maps and their change-of-variable identities 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
Dependency tree · two levels
31 results within two dependency steps of this one, each drawn at its shortest distance from it. An arrow runs from a result to what uses it, so the chart reads left to right and ends at this result, which carries a heavier outline. Every node is a link to that result. Click elsewhere on the chart to enlarge it.
Sources
- MIT OpenCourseWare 18.100B Real Analysis, Spring 2025 full lecture notes (standard reference, not scraped)
- J. Lebl, Basic Analysis, Logarithm and Exponential (standard reference, not scraped)