Psychology & Psychiatry

Parents harsher with toddlers during first lockdown

Parents of toddlers often reacted more harshly with their child during the first corona lockdown in The Netherlands (April and May 2020), for example by shaking them or yelling at them, than a comparable group of parents ...

Diseases, Conditions, Syndromes

Madrid deaths jumped 41 percent in 2020 as pandemic hit

The number of deaths from all causes in the Madrid region, the epicentre of the coronavirus pandemic in Spain, jumped 41 percent in 2020 over the previous year, official figures showed Thursday.

Vaccination

Italy sets record for daily COVID vaccinations

A record 600,000 doses of COVID vaccine were administered in Italy on Friday, authorities said, putting the country in second place in Europe for the number of people fully vaccinated.

Diseases, Conditions, Syndromes

Pandemic slows in Asia and Europe

The pandemic slowed for the fifth week in a row around the world, especially in Europe and Asia, including in India, which nevertheless continued to bear the brunt.

Diseases, Conditions, Syndromes

Dutch 'end lockdown' as Covid measures eased

The Netherlands will reopen indoor restaurants, museums and cinemas in a major easing of coronavirus restrictions that Prime Minister Mark Rutte said marked the "end of the lockdown".

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Number

A number is a mathematical object used to count and measure. In mathematics, the definition of number has been extended over the years to include such numbers as zero, negative numbers, rational numbers, irrational numbers, and complex numbers.

Mathematical operations are certain procedures that take one or more numbers as input and produce a number as output. Unary operations take a single input number and produce a single output number. For example, the successor operation adds one to an integer, thus the successor of 4 is 5. Binary operations take two input numbers and produce a single output number. Examples of binary operations include addition, subtraction, multiplication, division, and exponentiation. The study of numerical operations is called arithmetic.

A notational symbol that represents a number is called a numeral. In addition to their use in counting and measuring, numerals are often used for labels (telephone numbers), for ordering (serial numbers), and for codes (e.g., ISBNs).

In common use, the word number can mean the abstract object, the symbol, or the word for the number.

This text uses material from Wikipedia, licensed under CC BY-SA