DeepSeek YarnRotaryEmbedding._set_cos_sin_cache: freq extra

Read the equation

In DeepseekV3YarnRotaryEmbedding._set_cos_sin_cache, this statement defines or updates freq_extra. The expression forms a quotient or integer division. The denominator, integer rounding and tensor shape convention determine its scale or index result.

Terms & definitions

The recovered passage does not supply a separate symbol table. Read the source context for the notation used in this version; familiar letters may carry different meanings in other builds.

How it works

1. Read freq_extra as the quantity being defined or updated by this relation.

2. Substitute the source-defined variables or recorded values and follow the displayed arithmetic and indexing exactly.

3. Use this version’s variable definitions and update order. The same symbol may be assigned a different meaning in another build.

Assumptions & limits

Source recovery establishes that the expression appears in this record. Its mathematical validity, implementation behavior, and interpretation must be assessed separately. See the linked source and research notes for the checks available for this version.

Original context

self.max_seq_len_cached = seq_len
        dim = self.dim

        freq_extra = 1.0 / (self.base**(
            torch.arange(0, dim, 2, dtype=torch.float32, device=device) / dim))
        freq_inter = 1.0 / (self.scaling_factor * self.base**(
            torch.arange(0, dim, 2, dtype=torch.float32, device=device) / dim))

freq_extra = 1.0 / (self.base**(
            torch.arange(0, dim, 2, dtype=torch.float32, device=device) / dim))

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