👉 The invitation fluid is a concept in social network analysis that describes how individuals are invited into different groups or communities over time. It captures the dynamic and often gradual process of forming connections, where an invitation might not be immediately accepted but rather fluidly integrated into a person's social network. This model recognizes that relationships and group memberships are not static but evolve, reflecting the changing nature of social interactions and the influence of various factors such as personal preferences, social norms, and external events. The invitation fluid helps in understanding the complexities of network growth and the formation of social ties in a more nuanced and realistic manner.