Two of the things that the Church emphasized about the resurrection was the empty tomb and the appearances of the risen Jesus. The Catechism makes sure to note how the empty tomb was the early sign for the apostles that Jesus had in fact risen and that it led some of the to believe. It also emphasizes the appearances of the Jesus after his resurrection to show that it is not just a couple people who say they witnessed it. Jesus appeared to over 500 people at one time, thus showing that Jesus was truly resurrected from the dead.
To say that the resurrection is the work of the trinity is to imply that all three parts of the trinity took on instrumental roles in the resurrection. First, God the Father raised Jesus up in his humanity, but it is also through Jesus’s divine power that it comes to pass. And as for the spirit, it was the spirit who gave life back to Jesus’s dead humanity—bringing him up to glory.
It is through Christ’s resurrection that we are given the opportunity to be born again in Christ. Because it is through Jesus’s passion, death, and resurrection that we are saved from our sins, it is also through him that we are able to be resurrected with him. Because of this, our resurrection is directly tied to Jesus’s sacrifice and ultimately his resurrection.
John Seida 
I think that your response is pretty spot-on. Not only did Jesus appear to his disciples and the holy women, but he also appeared to an entourage of 500 people; the great number of people who saw him after his death contributes to the realness of Jesus’ resurrection.
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I was also surprised to learn that over 500 people witnessed the risen Jesus– I had thought it only to be the disciples and the holy women. Jesus’s widespread manifestation is evidence of his gracious mercy and love, that he will take anyone into his kingdom who displays the faith, no matter background or past sins.
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