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  2. Proximal operator - Wikipedia

    en.wikipedia.org/wiki/Proximal_operator

    In mathematical optimization, the proximal operator is an operator associated with a proper, [note 1] lower semi-continuous convex function from a Hilbert space to [, +], and is defined by: [1]

  3. COVID-19 pandemic death rates by country - Wikipedia

    en.wikipedia.org/wiki/COVID-19_pandemic_death...

    This data is for entire populations, and does not reflect the differences in rates relative to different age groups. For example, in the United States as of 27 April 2021, the reported case fatality ratios were 0.015%, 0.15%, 2.3%, and 17% for the age groups 0–17, 18–49, 50–74, and 75 or over, respectively. [1]

  4. List of Boeing 787 operators - Wikipedia

    en.wikipedia.org/wiki/List_of_Boeing_787_operators

    In June 2024 there were 1115 Boeing 787 aircraft in airline service, comprising 397 787-8s, 621 787-9s and 97 787-10s. [1] The largest operators at that time were All Nippon Airways (82), United Airlines (71), American Airlines (59), Qatar Airways (47), Japan Airlines (46), Etihad Airways (40), Hainan Airlines (38), Air Canada (38), British Airways (37), Ethiopian Airlines (29), Air India (27 ...

  5. Human penis - Wikipedia

    en.wikipedia.org/wiki/Human_penis

    In human anatomy, the penis (/ ˈ p iː n ɪ s /; pl.: penises or penes; from the Latin pēnis, initially "tail" [1]) is an external male sex organ (intromittent organ) that serves as a passage for excretion of urine and ejaculation of semen.

  6. Mathematical Operators (Unicode block) - Wikipedia

    en.wikipedia.org/wiki/Mathematical_Operators...

    Mathematical Operators is a Unicode block containing characters for mathematical, logical, and set notation.. Notably absent are the plus sign (+), greater than sign (>) and less than sign (<), due to them already appearing in the Basic Latin Unicode block, and the plus-or-minus sign (±), multiplication sign (×) and obelus (÷), due to them already appearing in the Latin-1 Supplement block ...

  7. 311 (telephone number) - Wikipedia

    en.wikipedia.org/wiki/311_(telephone_number)

    The first use of 3-1-1 for informational services was in Baltimore, Maryland, where the service commenced on 2 October 1996. [2] 3-1-1 is intended to connect callers to a call center that can be the same as the 9-1-1 call center, but with 3-1-1 calls assigned a secondary priority, answered only when no 9-1-1 calls are waiting.

  8. Angular momentum operator - Wikipedia

    en.wikipedia.org/wiki/Angular_momentum_operator

    Classical rotations do not commute with each other: For example, rotating 1° about the x-axis then 1° about the y-axis gives a slightly different overall rotation than rotating 1° about the y-axis then 1° about the x-axis. By carefully analyzing this noncommutativity, the commutation relations of the angular momentum operators can be derived.

  9. Ophthalmic technician - Wikipedia

    en.wikipedia.org/wiki/Ophthalmic_Technician

    An ophthalmic technician plays an important role in patient care. Patients see an ophthalmic technician to have the initial portion of their eye examination completed. . During the initial assessment the ophthalmic technician takes the patient's history, assesses visual acuity, tests confrontational visual fields, evaluates pupils and ocular muscles, measures intraocular pressure and performs ...