AI RESEARCH
The Shape of Addition: Geometric Structures of Arithmetic in Large Language Models
arXiv CS.LG
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ArXi:2606.03645v1 Announce Type: new Large Language Models exhibit paradoxical fragility in fundamental arithmetic, implying a disconnect between internal computation and discrete output. By analyzing the residual stream geometry during multi-operand addition, we identify the Iso-Raw-Sum Trajectory (IRST), a geometric structure where representations are anchored by semantic digits and modulated by continuous carry fibers.