ˆPk = FFN(Pk), ˆPv = FFN(Pv).

(8)
(9)

SPOT (Soft Prompt Transfer) [26] is a multitask prompt
method that builds upon the prompt-tuning, in which “prompt
pertaining” is introduced between PLMs and prompt-tuning
tasks. There are two variants of SPOT: generic
of target
Parameter-EfficientFine-TuningMethods