Pith Number

pith:HMCK3OCA

pith:2026:HMCK3OCAZRHG4TW4JTBU3T54SO

not attested not anchored not stored refs pending

Subtract or Replay? Exact Deletion from Language-Model Memory

Vishwajith Ramesh

arxiv:2607.27539 v1 · 2026-07-30 · cs.LG · cs.CL

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{HMCK3OCAZRHG4TW4JTBU3T54SO}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-07-31T01:25:25.259147Z
Builder	pith-number-builder-2026-05-17-v1
Signature	unsigned_v0
Schema	pith-number/v1.0

Canonical hash

3b04adb840cc4e6e4edc4cc34dcfbc93b1e7deb952f701caf8cd367ea0fdc30e

Aliases

arxiv: 2607.27539 · arxiv_version: 2607.27539v1 · doi: 10.48550/arxiv.2607.27539 · pith_short_12: HMCK3OCAZRHG · pith_short_16: HMCK3OCAZRHG4TW4 · pith_short_8: HMCK3OCA

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/HMCK3OCAZRHG4TW4JTBU3T54SO \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 3b04adb840cc4e6e4edc4cc34dcfbc93b1e7deb952f701caf8cd367ea0fdc30e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "712c585c3ec3e6718c7cb69a8c9db7becc5dff809e64297d77f26966d40afad6",
    "cross_cats_sorted": [
      "cs.CL"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2026-07-30T00:17:05Z",
    "title_canon_sha256": "3373b605199fd5d3168df2784b3c8e3d4d9308e76f93cbcf633bb6be0366a22c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2607.27539",
    "kind": "arxiv",
    "version": 1
  }
}