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  2. Blackboard bold - Wikipedia

    en.wikipedia.org/wiki/Blackboard_bold

    Blackboard bold is a style of writing bold symbols on a blackboard by doubling certain strokes, commonly used in mathematical lectures, and the derived style of typeface used in printed mathematical texts. The style is most commonly used to represent the number sets ( natural numbers ), ( integers ), ( rational numbers ), ( real numbers ), and ...

  3. Einstein's Blackboard - Wikipedia

    en.wikipedia.org/wiki/Einstein's_blackboard

    Einstein's Blackboard is a blackboard [1] which physicist Albert Einstein (1879–1955) used on 16 May 1931 during his lectures while visiting the University of Oxford in England. [2] [3] The blackboard is in the collection of the Museum of the History of Science in Oxford. [4] [5] The equations in the blackboard are related to the cosmological ...

  4. Twitter - Wikipedia

    en.wikipedia.org/wiki/Twitter

    In 2023, Twitter introduced a paywall system that required businesses to pay for access to its platform. The payment scheme's upper limit amounts to an annual fee of up to $2.5 million for top-tier access. With the paywall implementation, public agencies issued numerous alerts about potential interruptions to transit and weather.

  5. Phlegm or Mucus in Throat: Causes, Treatment, and More

    www.healthline.com/health/overproduction-of...

    Gargle with warm salt water: This home remedy can help clear mucus from the back of your throat and may help kill germs. Humidify the air: Moisture in the air can help keep your mucus thin. Stay ...

  6. Blackboard Learn - Wikipedia

    en.wikipedia.org/wiki/Blackboard_Learn

    Blackboard Learn (previously the Blackboard Learning Management System) is a web-based virtual learning environment and learning management system developed by Blackboard Inc. The software features course management, customizable open architecture, and scalable design that allows integration with student information systems and authentication ...

  7. Email client - Wikipedia

    en.wikipedia.org/wiki/Email_client

    An email client, email reader or, more formally, message user agent (MUA) or mail user agent is a computer program used to access and manage a user's email. A web application which provides message management, composition, and reception functions may act as a web email client , and a piece of computer hardware or software whose primary or most ...

  8. OpenAI - Wikipedia

    en.wikipedia.org/wiki/OpenAI

    OpenAI also makes GPT-4 available to a select group of applicants through their GPT-4 API waitlist; after being accepted, an additional fee of US$0.03 per 1000 tokens in the initial text provided to the model ("prompt"), and US$0.06 per 1000 tokens that the model generates ("completion"), is charged for access to the version of the model with ...

  9. Stay informed about COVID-19 symptoms & prevention. Explore WebMD's comprehensive resource for information on signs, precautions, & the latest updates