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test: add backend coverage for assertions TCAPI V1 does not define

Status: Open.

#25 In r-ccs-cms/tensor-computing-interface-backend-cytnx;

· ultimatile opened on Aug 14, 2026

diag: non-square input uses the row count as the stride, returning wrong diagonal values

Status: Open.

#24 In r-ccs-cms/tensor-computing-interface-backend-cytnx;

· ultimatile opened on Aug 14, 2026

trunc_svd ignores target_trunc_err when it is exactly 0

Status: Open.

#22 In r-ccs-cms/tensor-computing-interface-backend-cytnx;

· ultimatile opened on Aug 12, 2026

trunc_svd duplicates its kept-singular-value sum across dtype branches

Status: Open.

#19 In r-ccs-cms/tensor-computing-interface-backend-cytnx;

· ultimatile opened on Aug 7, 2026

complex64 matrix exponential unitarity check fails intermittently

Status: Open.

#18 In r-ccs-cms/tensor-computing-interface-backend-cytnx;

· ultimatile opened on Aug 7, 2026

Forward cross-compilation settings to the arpack-ng ExternalProject

Status: Open.

#17 In r-ccs-cms/tensor-computing-interface-backend-cytnx;

· ultimatile opened on Jun 10, 2026

tci::to_cplx fails on cytnx_float inputs

Status: Open.

#11 In r-ccs-cms/tensor-computing-interface-backend-cytnx;

· ultimatile opened on May 9, 2026

Single-precision SVD / eig conformance tests exceed default tolerance

Status: Open.

#10 In r-ccs-cms/tensor-computing-interface-backend-cytnx;

· ultimatile opened on May 9, 2026

tci::save does not persist to extensionless filepaths; tci::load then errors not-found

Status: Open.

#9 In r-ccs-cms/tensor-computing-interface-backend-cytnx;

· ultimatile opened on May 9, 2026

trace: full trace returns order-1 tensor instead of order-0 scalar (spec violation)

Status: Open.

#3 In r-ccs-cms/tensor-computing-interface-backend-cytnx;

· ultimatile opened on Mar 26, 2026

normalize: zero-norm behavior is unspecified

Status: Open.

#2 In r-ccs-cms/tensor-computing-interface-backend-cytnx;

· ultimatile opened on Mar 26, 2026