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The long right double arrow symbol denotes logical implication in math.
⇓ Downwards Double Arrow copy and paste - HotSymbol
Supplemental Arrows-A, ⟰ ⟱ ⟲, 16 symbols, Unicode Range: 27F0
Equations - Symbols
Arrow Types in LaTeX: A Complete List
Unicode: Arrows → ➵ ➛ ➲ ➤
Unicode: Arrows → ➵ ➛ ➲ ➤
Arrow Symbol
long-rightwards-double-arrow
Unicode: Arrows → ➵ ➛ ➲ ➤
Equations - Symbols
4,126 Thin Double Arrow Images, Stock Photos, 3D objects
What does a double arrow sign mean? - Quora
What does a double arrow sign mean? - Quora
Long left arrow Reference