Fork3

Fork3 (Triple Duplicate)

Splits a single input into three identical outputs. Used for attention mechanisms where Q, K, V projections start from the same input.

Shape Contract:

• Input: [*shape] arbitrary shape
• Output a: [*shape] first copy
• Output b: [*shape] second copy
• Output c: [*shape] third copy

Notes:

• No learnable parameters (pure structural operation)
• Zero-copy in most implementations (shares memory)
• Primary use: self-attention Q/K/V generation
• All three outputs are identical references to input
• Can be composed with Fork for more branches

Signature

neuron Fork3()

Ports

Inputs:

• default: [*shape]

Outputs:

• a: [*shape]
• b: [*shape]
• c: [*shape]

Implementation

Source { source: "core", path: "structural/Fork3" }