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  3. Fidelity of quantum states - Wikipedia

    en.wikipedia.org/wiki/Fidelity_of_quantum_states

    Fidelity is symmetric in its arguments, i.e. F (ρ,σ) = F (σ,ρ). Note that this is not obvious from the original definition. F (ρ,σ) lies in [0,1], by the Cauchy–Schwarz inequality. F (ρ,σ) = 1 if and only if ρ = σ, since Ψ ρ = Ψ σ implies ρ = σ. So we can see that fidelity behaves almost like a metric.

  4. Non-numerical words for quantities - Wikipedia

    en.wikipedia.org/wiki/Non-numerical_words_for...

    The English language has a number of words that denote specific or approximate quantities that are themselves not numbers. [1] Along with numerals, and special-purpose words like some, any, much, more, every, and all, they are Quantifiers. Quantifiers are a kind of determiner and occur in many constructions with other determiners, like articles ...

  5. Silver ratio - Wikipedia

    en.wikipedia.org/wiki/Silver_ratio

    The silver ratio is a Pisot–Vijayaraghavan number (PV number), as its conjugate 1 − √ 2 = ⁠ −1 / δ S ⁠ ≈ −0.41421 has absolute value less than 1. In fact it is the second smallest quadratic PV number after the golden ratio. This means the distance from δ n S to the nearest integer is ⁠ 1 / δ n S ⁠ ≈ 0.41421 n.

  6. Fidelity boosts valuations of its stakes in Elon Musk’s X and ...

    www.aol.com/finance/fidelity-boosts-valuations...

    After marking down the value of its investment in Elon Musk's X repeatedly, Fidelity boosted its estimate last month for its stake in the social media platform, sources told Axios.. October saw a ...

  7. Vanguard vs. Fidelity: Which Brokerage Gives The Best Bang ...

    www.aol.com/finance/vanguard-vs-fidelity...

    For bonds, Fidelity's commission is cheaper at $1, as well as a $19.95 fee if you initiate a broker-assisted transaction. Vanguard unfortunately doesn't offer new issue bonds.

  8. Fidelity Magellan Fund - Wikipedia

    en.wikipedia.org/wiki/Fidelity_Magellan_Fund

    The Fidelity Magellan Fund (Mutual fund: FMAGX) is a U.S.-domiciled mutual fund from the Fidelity family of funds. [1] It is perhaps the world's best-known actively managed mutual fund, known particularly for its record-setting growth under the management of Peter Lynch from 1977 to 1990. [ 2 ]

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