Pith Number

pith:OBJHDZVD

pith:2026:OBJHDZVDNXHJRHEBABRHCHN6LS

not attested not anchored not stored refs pending

SFO: Learning PDE Operators via Spectral Filtering

Elad Hazan, Kira Radinsky, Noam Koren, Rafael Moschopoulos

arxiv:2601.17090 v2 · 2026-01-23 · cs.LG · cs.AI

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{OBJHDZVDNXHJRHEBABRHCHN6LS}

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	2026-07-14T02:21:28.123942Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

705271e6a36dce989c810062711dbe5cb4ba4df016b727ae739f50abd557db71

Aliases

arxiv: 2601.17090 · arxiv_version: 2601.17090v2 · doi: 10.48550/arxiv.2601.17090 · pith_short_12: OBJHDZVDNXHJ · pith_short_16: OBJHDZVDNXHJRHEB · pith_short_8: OBJHDZVD

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/OBJHDZVDNXHJRHEBABRHCHN6LS \
  | 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: 705271e6a36dce989c810062711dbe5cb4ba4df016b727ae739f50abd557db71

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4abeff281067400bb213ef6b8055ee140983306bc357a1f091972ad1af367794",
    "cross_cats_sorted": [
      "cs.AI"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2026-01-23T10:45:52Z",
    "title_canon_sha256": "efcebd4600b41071ab70e27127d18011d8be7e7b4852e5f7b4930e07c3b4158b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2601.17090",
    "kind": "arxiv",
    "version": 2
  }
}