The Gospel Declared!

The gospel of Christ is NOT the gospel of Christ if Christ did not rise "ALIVE" from the gravel Paul therefore dealt with the resurrection of the Lord Jesus Christ (and the resurrection of saints) at length to quell this lie that had crept into the church from "SOME" false teachers among them.
That brings us to the opening text of 1 Corinthians 15:1-11
1 Corinthians 15: 1: Paul wrote: Let me REMIND you that THE gospel that I "PREVIOUSLY PREACHED" to you IS the same gospel that I NOW DECLARE unto you again!
There is no indication that the Corinthian Church had denied the resurrection of Christ, but only that there were "SOME" in the church spreading this false teaching that "there is no resurrection of the dead".