2,084 results for constant

arxiv.org/abs/astro-ph/9911493v1

A Younger Age for the Universe

The age of the universe in the Big Bang model can be calculated from three parameters: Hubble's constant, h; the mass density of the universe, Omega_m; and the cosmological constant, Omega_lambda. Recent observations of the cosmic microwave backgro...

arxiv.org/abs/math/0507231v1

A family of criteria for irrationality of Euler's constant

Following earlier results of Sondow, we propose another criterion of irrationality for Euler's constant $γ$. It involves similar linear combinations of logarithm numbers $L\_{n,m}$. To prove that $γ$ is irrational, it suffices to prove that, for...

arxiv.org/abs/2004.10207v2

Hubble constant difference between CMB lensing and BAO measurements

We apply a tension metric $Q_\textrm{UDM}$, the update difference in mean parameters, to understand the source of the difference in the measured Hubble constant $H_0$ inferred with cosmic microwave background lensing measurements from the Planck sate...

en.wikipedia.org/wiki/Mathematical_and_theoretical_biology

Mathematical and theoretical biology - Wikipedia

ultrasensitive transcription factors, afterwards the parameters of the equations (rate constants, enzyme efficiency coefficients and Michaelis constants) must be fitted

arxiv.org/abs/1306.0980v1

Volatility in options formulae for general stochastic dynamics

It is well-known that the Black-Scholes formula has been derived under the assumption of constant volatility in stocks. In spite of evidence that this parameter is not constant, this formula is widely used by financial markets. This paper addresses t...

arxiv.org/abs/1804.08169v1

Carter Constant and Superintegrability

Carter constant is a non-trivial conserved quantity of motion of a particle moving in stationary axisymmetric spacetime. In the version of the theorem originally given by Carter, due to the presence of two Killing vectors, the system effectively has...

arxiv.org/abs/2103.16720v3

How to hunt wild constants

There are now several comprehensive web applications, stand-alone computer programs and computer algebra functions that, given a floating point number such as 6.518670730718491, can return concise nonfloat constants such as 3 arctan 2 + ln 9 + 1, tha...

arxiv.org/abs/1207.7040v2

Fault-Tolerant Spanners for Doubling Metrics: Better and Simpler

In STOC'95 Arya et al. (1995) conjectured that for any constant dimensional $n$-point Euclidean space, a $(1+\eps)$-spanner with constant degree, hop-diameter $O(\log n)$ and weight $O(\log n) \cdot ω(MST)$ can be built in $O(n \log n)$ time. Recent...