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Welsh has two systems of grammatical number, singular–plural and collective–singulative. Since the loss of the noun inflection system of earlier Celtic, plurals have become unpredictable and can be formed in several ways: by adding a suffix to the end of the word (most commonly -au), as in tad "father" and tadau "fathers", through vowel affection, as in bachgen "boy" and bechgyn "boys", or ...
In mathematics, a real-valued function f on the interval [a, b] is said to be singular if it has the following properties: f is continuous on [ a , b ]. there exists a set N of measure 0 such that for all x outside of N, the derivative f ′ ( x ) exists and is zero; that is, the derivative of f vanishes almost everywhere .
In mathematics and logic, plural quantification is the theory that an individual variable x may take on plural, as well as singular, values.As well as substituting individual objects such as Alice, the number 1, the tallest building in London etc. for x, we may substitute both Alice and Bob, or all the numbers between 0 and 10, or all the buildings in London over 20 stories.
Although many languages treat collective nouns as singular, in others they may be interpreted as plural. In British English, phrases such as the committee are meeting are common (the so-called agreement in sensu "in meaning"; with the meaning of a noun, rather than with its form, see constructio ad sensum). The use of this type of construction ...
In mathematics, two positive (or signed or complex) measures and defined on a measurable space (,) are called singular if there exist two disjoint measurable sets , whose union is such that is zero on all measurable subsets of while is zero on all measurable subsets of .
Singular may refer to: Singular, the grammatical number that denotes a unit quantity, as opposed to the plural and other forms; Singular or sounder, a group of boar, see List of animal names; Singular (band), a Thai jazz pop duo; Singular: Act I, a 2018 studio album by Sabrina Carpenter; Singular: Act II, a 2019 studio album by Sabrina Carpenter
The plurals of the names of fishes either take the ending -s or is the same as the singular. Other nouns that have identical singular and plural forms include: craft (meaning 'vessel'), including aircraft, watercraft, spacecraft, hovercraft (but in the sense of a skill or art, the plural is regular, crafts)
The word data is most often used as a singular collective mass noun in educated everyday usage. [1] [2] However, due to the history and etymology of the word, considerable controversy has existed on whether it should be considered a mass noun used with verbs conjugated in the singular, or should be treated as the plural of the now-rarely-used datum.