?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.relation=http%3A%2F%2Facta.bibl.u-szeged.hu%2F75837%2F&rft.title=Weak+center+for+a+class+of+%CE%9B%E2%80%93%E2%84%A6+differential+systems&rft.creator=+Zhou+Zhengxin&rft.subject=01.+Term%C3%A9szettudom%C3%A1nyok&rft.subject=01.01.+Matematika&rft.description=In+this+paper%2C+we+give+the+necessary+and+sufficient+conditions+for+a+class+of+higher+degree+polynomial+systems+to+have+a+weak+center.+As+corollaries%2C+we+prove+the+correctness+of+the+two+conjectures+about+the+weak+center+problem+for+the+%CE%9B%E2%80%93%E2%84%A6+differential+systems.&rft.date=2022&rft.type=Foly%C3%B3irat&rft.type=NonPeerReviewed&rft.format=full&rft.language=hu&rft.identifier=http%3A%2F%2Facta.bibl.u-szeged.hu%2F75837%2F1%2Fejqtde_2022_022.pdf&rft.identifier=+++Zhou+Zhengxin%3A+++Weak+center+for+a+class+of+%CE%9B%E2%80%93%E2%84%A6+differential+systems.++(2022)+++&rft.language=eng