California Partition Law Blog
No, not unless they want to convert their own, singular interest into two or more shares. The reason for this is that grantors in a deed can only convey what they already own. If two tenant in common co-owners want to make themselves joint tenants, then they can collectively convey their interests to themselves in a deed. This works because, together, they own the whole property.
But if one co-owner conveys the property to himself, and declares that he is now a joint tenant, that doesn’t work. Only half the property is being conveyed, and only one person is receiving the property. This does not meet the requirements of California’s Civil Code, which requires that a joint tenancy vest in two or more persons with equal shares. (Civ. Code § 683.)
Can a Tenant in Common Force a Sale?
In every property co-owned by two or more persons, there are common costs. Common costs are those costs for the property that are common to all owners or for the common benefit of all owners. In California, cotenants are required to pay for their portion of the common costs. Therefore, cotenants must pay for their share of expenses to operate and maintain the property. The portion of common costs one must pay depends on the ownership interest of that cotenant.
A 
Ejectment is an action brought by a party seeking to recover a possessory interest or claim of title in a piece of real property. Typically, an ejectment action arises when a titleholder to a piece of property has been wrongfully excluded or withheld from the property. Therefore, ejectment applies only to those cases where an individual actually has possessory title to the subject property.
American law has its roots in the laws of England. As such, many of the laws still on the books in the 21st Century depend on what English judges thought prior to our War for Independence began in 1776. Because our modern laws go back centuries since before the United States was a country, we should care about how our legal terms were originally understood as they may implicate a judge’s decision today. The most important of all the English Judges who influenced our modern laws was most likely Sir William Blackstone. 
A “waste” claim is a means of recovering damages when a tenant on real property does substantial damage to the property itself. Most often, a waste claim arises when a person renting property causes damage while living there. But a waste claim isn’t restricted to landlords and tenants. It applies to nearly all situations where two or more people have some sort of interest in the common property.
General partnerships, and their 
Yes. Co-owners of property are entitled to certain rights, namely, the right to possess and use the property as they see fit. But sometimes, things do not work out with the other owners. 
Joint tenancy is a special type of co-ownership recognized in California. It is commonly associated with married couples, ensuring that when one of them dies, their entire interest in the property passes to the other spouse. This is called the right of survivorship, and it is the defining trait of a joint tenancy.