TRUST or + R and S +

+ symbol

The "+" symbol, or plus sign, primarily signifies addition in mathematics and can also indicate positivity or a range of values. In other contexts, it can represent outer joins in SQL or be used for string concatenation in programming.

+ in SQL

As indicated in the official documentation, Oracle provides a special outer join operator (the + symbol) that is shorthand for performing OUTER JOINS

Stereocenters are labeled R or S for chiral compounds like DNA or glucose

in the center of the stereocenters is another center-logical conjunction ∧

+ or &

& stereocenter && stereocenter &

such that or so that or subject to s.t. – such that or so that or subject to. st – standard part function.

In music, "tr" is an abbreviation for "trill", which is a musical ornament that involves rapidly alternating between two notes. The "tr" is placed above the note that should be trilled.

Explanation A trill is a quick back-and-forth between a main note and the note above it.

Trills can add excitement and expressiveness to a melody.

Trills can be notated using the letters "tr" or a wavy line.

In the baroque and early classical periods, a wavy line on its own was used to indicate a trill.

This symbol was called a chevron.

A wavy line can also be used after the letters "tr" to indicate how long the trill should last.

logical conjunction ∧ is (most often) the mathematical symbol for logical conjunction, which is equivalent to the AND operator you're used to. Similarly ∨ is (most often) logical disjunction, which would be equivalent to the OR operator

in sentential logic, for example, if you know that a is true and you know that b is true, you can conclude that 'a & b' is true. and that's how we use our english word 'and' as well. you can't have both an acura and a battleship unless it's true that you have an acura and it's true that you have a battleship.

Contingency: An existing condition, situation, or set of circumstances involving uncertainty as to possible gain (gain contingency) or loss (loss contingency) to an entity that will ultimately be resolved when one or more future events occur or fail to occur.

Statum mentis statum essendi