# Lambda, the Fifth Foundational Constant Considered by Einstein

## TL;DR

This paper argues for recognizing the cosmological constant Lambda as a fundamental constant akin to Planck's and Newton's constants, emphasizing its potential foundational role in physics and metrology.

## Contribution

It proposes considering Lambda as a fifth foundational constant, highlighting its conceptual and metrological significance alongside other fundamental constants.

## Key findings

- Lambda's role parallels other fundamental constants
- Potential for Lambda to be a cornerstone in physics and measurement standards
- Reinforces Lambda's importance in the cosmological model

## Abstract

The cosmological constant, usually named Lambda, was introduced by Einstein in 1917 and abandoned by him as his biggest "blunder". It currently seems to make a spectacular comeback in the framework of the new cosmological standard model. One will explain why, together with the Planck's constant, the Boltzmann's constant, the celerity of light and the Newton's constant, also considered by Einstein, the cosmological constant may play a foundational role in the conceptual framework, an in the metrological framework a role comparable with the one attributed to Avogadro constant

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Source: https://tomesphere.com/paper/1802.08317