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In the first part of the paper, after applying the transformation $x^1\\rightarrow J(x^1)$, $x^2\\rightarrow F(x^2)$(with $J(x^1), F(x^2)$ regular functions) to general metrics coefficients $g_{ab}(x^1,x^2)\\rightarrow g_{ab}(J(x^1), F(x^2))$ with $G_{x^1 x^2}=0$, being $G_{ab}$ the Einstein's tensor, we obtain that ${\\tilde{G}}_{x^1 x^2}=0\\rightarrow G_{x^1 x^2}(J(x^1),F(x^2))"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1811.00769","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2018-11-02T08:03:49Z","cross_cats_sorted":["astro-ph.SR","hep-th"],"title_canon_sha256":"45ce1b7b3b5caf698e9ccb1c633b125d5eaebb57b074d9efe4be538cad45b566","abstract_canon_sha256":"098016b29fb61ccd15d7eb5eb45e7c23042e355cd1cec02e21191d61aa56c737"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:57:21.248220Z","signature_b64":"NZ0basg3iweZV+O7vhcYKTEMQM+dAaKeP6ptk3rSvn93Sj7xoxw2ew3ny74U8xSDgd5PiikD+v/GrsUppmcCDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9653a289b2f1c149689b3a3ad9bdf0854dc949c050d5df50202d6d35f5332b92","last_reissued_at":"2026-05-17T23:57:21.247646Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:57:21.247646Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"An algorithm to generate anisotropic rotating fluids with vanishing viscosity","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR","hep-th"],"primary_cat":"gr-qc","authors_text":"Stefano Viaggiu","submitted_at":"2018-11-02T08:03:49Z","abstract_excerpt":"Starting with generic stationary axially symmetric spacetimes depending on two spacelike isotropic orthogonal coordinates $x^{1}, x^{2}$, we build anisotropic fluids with and without heat flow but with wanishing viscosity. 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