Omegas

Omegas are multiple things associated with the word Omega, the last letter of the Greek alphabet. The term is used across disciplines and contexts to name quantities, symbols, brands, and dietary fats.

In mathematics and computer science, Big Omega notation (Ω) describes a lower bound on growth rates of functions or algorithms. The expression f(n) = Ω(g(n)) means f grows at least as fast as g for large n.

In physics and engineering, uppercase Omega (Ω) denotes electrical resistance in ohms, and is also used for solid angles. The lowercase omega (ω) commonly denotes angular frequency or angular velocity.

In cosmology and astronomy, Ω is used to denote density parameters such as Ωm (matter density) and ΩΛ (dark energy density), indicators of the universe’s composition and fate. In star naming, Omega is used to label bright stars within a constellation, and in some cases to name star clusters or objects such as Omega Centauri.

In nutrition, omega-3 and omega-6 fatty acids are essential fats, often referred to collectively as omegas. They are named for the position of a carbon–carbon bond in their molecular structure and are commonly discussed in dietary contexts.

In culture and industry, Omega is a well-known Swiss watchmaker, and the name appears in various brands, products, and fictional contexts. The uses of the term reflect its broad symbolic significance as a final or comprehensive reference.