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scop

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It would help to see the context in which these symbols are used. It's possible that they may not have been used elsewhere, or have a specific meaning within this particular paper. A textbook resource may be useful as well, but it may not have the exact same symbols. Thank you!In summary, the individual is seeking a paper or textbook resource where the "plus sign in triangle", "minus sign in triangle", and/or "multiplication sign in triangle" are used. They have encountered these symbols in a paper from the 80's, where they are used to act on an image, and are hoping to find them applied in other contexts. They also mention that a textbook resource may be acceptable, but it may not use

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scop

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SteamKing

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scop said:

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It's difficult to decipher what these symbols mean. Can you provide a reference or a link to the paper in which you found them? Sometimes, authors create special symbols to express concepts which have otherwise not been explored.

The plus sign in a triangle is used in mathematics to indicate addition. It represents the operation of combining two or more quantities to find their sum.

In geometry, the plus sign in a triangle is used to represent a line segment or vector that is added to another line segment or vector. It is also used to indicate the direction of a vector.

The minus sign in a triangle is used to indicate subtraction. It represents the operation of taking away one quantity from another to find their difference.

In trigonometry, the minus sign in a triangle is used to represent a negative angle or angle of rotation in the clockwise direction. It is also used to indicate the opposite or negative side of a triangle in relation to an angle.

The times symbol in a triangle is used to indicate multiplication. It represents the operation of repeated addition, where one quantity is added to itself a certain number of times.

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