DiffTaichi (Hu et al., ICLR 2020) — ChainQueen's direct kin paper — explicitly names Griewank and Wengert as its AD lineage, but Linnainmaa and Speelpenning still go unnamed

linnainmaagriewankspeelpenningwengertautomatic-differentiationdifftaichitaichichainqueenmaterial-point-methodcitation-historyhistory-of-mlbridge-investigation

DiffTaichi is not a distant member of "the wider differentiable-physics literature" around ChainQueen — it shares ChainQueen's first author (Yuanming Hu), explicitly follows "ChainQueen's implementation (Hu et al., 2019b)" for its own differentiable-MPM demo, and sits in the same Taichi lineage ChainQueen's own footnote credits ("Based [on] the Taichi [30] open source computer graphics library"). Unlike ChainQueen and Bolliger et al., DiffTaichi's design-decision section names a specific AD-tradition figure by name, twice: "Source Code Transformation (SCT) (Griewank & Walther, 2008) and Tracing (Wengert, 1964) are common choices when designing AD systems," and, describing its own reverse-mode compiler pass, "which it achieves with reverse-mode AD, using a standard source code transformation (Griewank & Walther, 2008)." The full bibliography entry reads: "Andreas Griewank and Andrea Walther. Evaluating derivatives: principles and techniques of algorithmic differentiation, volume 105. Siam, 2008." The same bibliography separately credits R. E. Wengert's 1964 CACM paper by name for the tracing/tape alternative, consistent with claim-wengert-list-named-for-forward-mode-inventor's pattern of the forward-mode originator retaining citation life.

Seppo Linnainmaa and Bert Speelpenning do not appear anywhere in DiffTaichi's 43-entry bibliography or body text, read in full, despite the paper implementing the reverse-mode operation their respective work established. DiffTaichi's bibliography also separately names Pearlmutter & Siskind (2008) and Hascoet & Pascual (2013, Tapenade) as AD-tool citations distinct from Griewank & Walther — a second compiler-AD-tradition citation inside the same paper, not explored further here.