Pith Number

pith:M5MB3TZF

pith:2021:M5MB3TZFOTCU7RNW3TMGPDZ3J7

not attested not anchored not stored refs pending

Preserving Earlier Knowledge in Continual Learning with the Help of All Previous Feature Extractors

Changhong Zhong, Ruixuan Wang, Sijia Liu, Wei-Shi Zheng, Zhuoyun Li

arxiv:2104.13614 v1 · 2021-04-28 · cs.CV · cs.LG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{M5MB3TZFOTCU7RNW3TMGPDZ3J7}

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	2026-07-05T02:35:56.445209Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

67581dcf2574c54fc5b6dcd8678f3b4fd2867847adf50aea28ae7209cbc0952a

Aliases

arxiv: 2104.13614 · arxiv_version: 2104.13614v1 · doi: 10.48550/arxiv.2104.13614 · pith_short_12: M5MB3TZFOTCU · pith_short_16: M5MB3TZFOTCU7RNW · pith_short_8: M5MB3TZF

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/M5MB3TZFOTCU7RNW3TMGPDZ3J7 \
  | 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: 67581dcf2574c54fc5b6dcd8678f3b4fd2867847adf50aea28ae7209cbc0952a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2accb18bb57fd60113714a02e0e54c4deedf74da10a2af41261d53f23d0cf5ee",
    "cross_cats_sorted": [
      "cs.LG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2021-04-28T07:49:24Z",
    "title_canon_sha256": "d33b26067e2a06c19be5221e1630b975ce9d122df076260eafdc28f2b0ad39e8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2104.13614",
    "kind": "arxiv",
    "version": 1
  }
}