Pith Number

pith:T3VXHKFN

pith:2019:T3VXHKFN5RAJFDJYDE7HS52XSE

not attested not anchored not stored refs pending

Non-existence of orthogonal complex structures on the round 6-sphere

Ana Cristina Ferreira

arxiv:1906.02062 v1 · 2019-06-05 · math.DG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{T3VXHKFN5RAJFDJYDE7HS52XSE}

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	2026-05-17T23:44:05.340791Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9eeb73a8adec40928d38193e797757910a6b6e6c5b1f3b3a4a255ea67064d755

Aliases

arxiv: 1906.02062 · arxiv_version: 1906.02062v1 · doi: 10.48550/arxiv.1906.02062 · pith_short_12: T3VXHKFN5RAJ · pith_short_16: T3VXHKFN5RAJFDJY · pith_short_8: T3VXHKFN

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/T3VXHKFN5RAJFDJYDE7HS52XSE \
  | 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: 9eeb73a8adec40928d38193e797757910a6b6e6c5b1f3b3a4a255ea67064d755

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0a2d78e988fc811e0f85271136cb1e255ffdab7dcb9ddc2f16ce8e2fca05f2fc",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2019-06-05T15:02:49Z",
    "title_canon_sha256": "549c95c5d260f21706b54ec4579b0204c3648ed5b78c9887c54cf82f43391243"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1906.02062",
    "kind": "arxiv",
    "version": 1
  }
}